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Q: A class of 25 students has 15 girls and 10 boys If one student is chosen at random What is the probability it is a girl?

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Probability that a girl is chosen = 23/45 = .511 So, the probability that a boy is chosen = 1 - .511 = .489

The probability is 15/25 = 3/5

The probability is 10 percent.

If a student is picked at random what is the probability that he/she received an A on his/her fina?

There is only one girl out of 12 students so the probability that the girl is selected is 1/12.

P( a student getting an A) = 5/20=1/4 There are 3 students. The probability that all three got an A is (1/4)(1/4)(1/4)=1/64.

"Playing cards" are chosen at random.

1/12 =0.08333... ≈ 8.3%

The probability of this is based heavily on whether or not said best friend is even in the class. If both are in, it's a 1/870 chance.Ê

3/4

The probability of a single point being chosen is 0.The probability of a single point being chosen is 0.The probability of a single point being chosen is 0.The probability of a single point being chosen is 0.

Q. A letter is chosen at random from the word STATistician.What is the probability that it is a vowel?What is the probability that it is T.

The probability is the number of girls divided by the number of students, so 12/22, or 6/11

What the answer

For a single random choice from a standard deck, the probability is 1/13.For a single random choice from a standard deck, the probability is 1/13.For a single random choice from a standard deck, the probability is 1/13.For a single random choice from a standard deck, the probability is 1/13.

1/6 if the letter is chosen at random.

The probability that the birthdays of five persons chosen at random will fall in twelve different calender months is zero. You would need at least twelve persons to have a non zero probability.

self-fulfilling prophecy

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

The probability of choosing 2 girls at random from group of 25 students of which10 are girls and 15 are boys is:P( 2 girls) = (10/25)∙(9/24) = 3/20 = 0.15 = 15%

49/9000

The probability of a woman being chosen in this situation is 7/11.

4 because in word perseverance we have 4 letters E

1/13

The probability is (4/52) * (4/52) = 1/169 = 0.0059, approx.

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