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A bag contains 2 yellow 12 red and 6 green marbles What is the probability of selecting a red marble replacing it then selecting another red marble?
Wiki User
∙ 13y ago
The probability of drawing two reds, with replacement, is the same as the probability of drawing a red, times itself. So:
P(drawing two reds) = P(drawing a red)2 = (12/(2 + 12 + 6))2 = (12/20)2 = (3/5)2 = 9/25
Wiki User
∙ 13y ago
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If a box contains 4 red marbles seven white and 5 blue and two marbles are drawn one at a time with replacement What is the probability that both marbles are white?
Since the box contains 16 marbles, seven of them white, then the probability of drawing one white marble is 7/16. If you replace the marble and draw again, the probability of drawing another white marble is still 7/16. The net probability of drawing two white marbles, while replacing the first, is 49/256.
Given eight students four of which are females if two students are selected at random without replacement what is the probability that both students are female?
The probability of selecting 1 female at random is 4/8 There are now 7 students, 3 of which are female so the probability of selecting another female is 3/7 The probability two randomly selected students are female is (4/8)x(3/7)= 3/14
When an event's probability depends on the likelihood of another event. the probability is what?
It is dependent.
There were 6 purple socks and 4 orange socks in a drawer Zucky picked one sock without looking and then another without looking replacing the first what is the probability that he picked 2 purple?
Probability of picking purple sock first time is 6/10 or 3/5, second time, probability is 5/9. Thus 3/5 * 5/9 = 15/45 which cancels to 1/3
10 cards are numbered from 1 to 10 and placed in a box One card is selected at random and is not replaced Another card is randomly selected What is the probability of selecting two prime numbers?
Primes are 2, 3, 5 and 7 which form 6 "prime pairs". There are 45 possible pairs in the box so the odds are 39 to 6 against ie 13/2, a probability of two-fifteenths or 13.3% or 0.13 recurring.
A bag contains 4red marbles 2 white marbles a marble is selected kept out the bag and then another marble is selected what is the probability of selecting a red marble and then white marble?
2/6
If a box contains 4 red marbles seven white and 5 blue and two marbles are drawn one at a time with replacement What is the probability that both marbles are white?
Since the box contains 16 marbles, seven of them white, then the probability of drawing one white marble is 7/16. If you replace the marble and draw again, the probability of drawing another white marble is still 7/16. The net probability of drawing two white marbles, while replacing the first, is 49/256.
Given eight students four of which are females if two students are selected at random without replacement what is the probability that both students are female?
The probability of selecting 1 female at random is 4/8 There are now 7 students, 3 of which are female so the probability of selecting another female is 3/7 The probability two randomly selected students are female is (4/8)x(3/7)= 3/14
What is the probability of drawing a red checker from a bag of 9 black checkers and 6 red checker replacing it and drawing another red checker?
4 out of 25
A bag contains 8 marbles 4 are blue 3 are green and one is orange you draw out one marble and then another without replacing the first marble Find the probability of drawing 2 blue marbles?
Probability of drawing a blue marble first is 4 in 8 (or 50%) Probability of drawing a blue marble second is 3 in 7 (or 42.85714%) Probablility of drawing blue then blue is the two above multiplied 0.5 * 0.4285714 Which is 0.212142407 or 21% or One in Five.
There are 10 rolls of film in a box and 3 are defective Two rolls are selected without replacement What is the probability of selecting a defective roll followed by another defective roll?
1/15 or about 0.07
If you draw a club at random from a deck of cards and then draw again after replacing the first card the probability of drawing another club is smaller the second time compared to the first time?
No, it is the same.
When an event's probability depends on the likelihood of another event. the probability is what?
It is dependent.
What is another name for Experimental Probability?
Another name for experimental probability is empirical probability. This is the ratio of the number of outcomes in which a specified event occurs to the total number of trials.
What is chance in maths?
Another word for probability.
A box contains 3 yellow 2 blue and 4 red pencils suppose you choose a pencil replace then choose another Find the probability of choosing yellow then red?
4/27
What is the definition of an event that has a probability of 1?
It's the probability that I will take another breath of air, or the probability that tomorrow will come, or the probability that the moon will go through all its phases for the next month.
