Probability Ques 6
Question-
What is the probability that a number selected from numbers $1,2,3, \ldots . .30$, is prime number, when each of the given numbers is equally likely to be selected?
(1) $\frac{9}{30}$
(2) $\frac{8}{30}$
(3) $\frac{10}{30}$
(4) $\frac{11}{30}$
(5) $\frac{21}{30}$
(IBPS Bank PO/MT CWE-V Main Exam. 31.10.2015)
Show Answer
Correct Answer: (3)
Solution: (3)
Prime numbers in $1,2,3 \ldots 30$ $=2,3,5,7,11,13,17,19,23$,$29=10$
Required probability $=\frac{10}{30}=\frac{1}{3}$
BETA
