It is Samaira's birthday, she has bought chocolates for all her 15 friends, and each friend has been given a position to sit which is labeled from 1 to 15. She has bought two kinds of chocolates, one Dairy Milk and the other Munch. She decided to give Dairy Milk to those who are seated on a seat labeled by a prime number. How many of her friends will get Dairy Milk ?

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Solution

The correct option is B 13
As the friends who are sitting in a position numbered as by the prime numbers will get Dairy Milk, we have to first know the number of prime numbers from 1 to 15.

The prime numbers are 2, 3, 5, 7, 11, 13 Clearly we can see that there are 6 prime numbers, so 6 of her friends will get Dairy Milk

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