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levacccp [35]
3 years ago
7

Suppose there are 21 students in your class. If the teacher draws 2 names at random, what is the probability that you and your b

est friend will be chosen?
2/21
1/20
1/105
1/210

Please explain how you got your answer! Ty!
Mathematics
1 answer:
natali 33 [55]3 years ago
7 0
1/21 * 1/20 = 1/420  that is the probability that you are chosen first. 
Probability of your friend chosen first = 1/420 also.

So the required probability = 1/420 + 1/420  = 1/210 Answer

Its D
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