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The probability that a number selected at random from the first...

This question belongs to Arithmetic Ability Probability
Probability
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The probability that a number selected at random from the first 50 natural numbers is a composite number is -

Answer & Solution
Correct Answer: Option B
The number of exhaustive events = $${{}^{50}{C_1}}$$ = 50
We have 15 primes from 1 to 50
Number of favourable cases are 34
Required probability = $$\frac{{34}}{{50}}$$ = $$\frac{{17}}{{25}}$$
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1 Comment
Inzamamul Islam
Inzamamul Islam 6 years ago
As total prime number is 15 then why isn't total favourable outcomes (50-15)=35?
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