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Q: What is the probability of picking even numbers from 20 to 40?

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The probability is 8/20.

The probability, in a single random selection, is 1/20 or 0.05

The probability of picking a distinct set of 3 numbers from 20 is1/[20!/(3!)(17!)]= 1/1140The probability of only picking 3 from 20 is1/20

Since there are 10 odd numbers (1, 3, 5, 7, 9, 11, 13, 15, 17, 19) in the 20 numbers (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20), the probability of picking an odd number in a random sample is 10 in 20, or 1 in 2, or 0.5.

A 1 out of 5 chance, or 20%

The probability of picking a 15 or a 16 from the random set [1-20] is 2 in 20, or 1 in 10, or 0.1.

The probability is 1 over 20.

21

There are 8 out of 20 numbers that are prime, so 8/20, or 2/5.

There are 20 numbers from 20 through 39, and 4 of them are prime (23, 29, 31, 37), the probability is 4 in 20 or 0.20.

There are 11 numbers from 10 to 20 if we include 10 and 20. Of those, only 16 is a perfect square. So the probability if 1/11 or .09 repeating.

There are 12 composite (and 8 primes) in the first twenty whole numbers. So the probability of randomly choosing a non-prime is 12/20 or 60%.

the even numbers between 10 and 20 are :10,12,14,16,18,20 so there are 4 even numbers between 10 and 20 (without counting the 10 and 20 =)) i hope this helped u =)

1/400

The theoretical probability of randomly picking each color marble is the number of color marbles you have for each color, divided by the total number of marbles. For example, the probability of selecting a red marble is 3/20.

20 out of 52.

The probability of selecting a red card is 26 in 52 or 1 in 2. The probability of selecting an even card is 20 in 52 or 5 in 13. The probability, therefore, of selecting a red even card is 1 in 2 times 5 in 13 or 5 in 26.

1 out of 20 this is because there are 20 numbers in total, and there is only one 7 in there. (Assuming that there is the same probability for each number to be chosen, and that 17 is excluded as an affirmative outcome)

The probability of selecting a 17 (or any number for that matter) is 1/20 or .05 or 5%.

20 even numbers

If one card is picked at random from a normal deck of cards, the probability is 20/52 or 5/13.

The probability, in one draw, is 6/20 or 30%

No. If two numbers have an even factor in common, they are even numbers. Two even numbers will have an even LCM.

The only even prime number is 2. It happens twice in the prime factorization of 20.

it's 20/50 times 19/49 times 18/48 tmes 17/47 etc down to 1/31