A beg contains 2 red, 3 green and 2 blue balls. If two balls are drawn at random, what is the probability that none of the balls drawn is blue ?

A 10/21
B 11/21
C 2/7
D 5/7

Correct Answer: 10/21

n(S) = 7C2 = 21 n( E) = 5C2 = 5! /2! 3! = 10 কোনো বলই নীল না হওয়ার সম্ভাবনা = n( E) / n(S) = 10/21
Bissoy MCQ
#গণিত #সম্ভাব্যতা (Probability) #Janata Bank Ltd #Janata Bank Ltd - Asst. Executive Officer - 04.08.2017

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