Question

9. Cards, marked with numbers 5 to 50, are placed in a box and mixed thoroughly. A card is drawn from
the box at random. Find the probability that the number on the taken card is
(i) a prime number less than 10. (ii) a number which is a perfect square. Do we include 5 and 50 as well??​

Answer 1

Explanation:

i) A prime no less than 10

prime no b/w 5 and 10 are 5,7 (including 5)

=2/46

=1/23

ii) A no which is a perfect square

perfect square b/w 5 to 50 are 9,16,25,36,49

so, no of perfect square b/w 5 to 50 are 5

=5/46

Yes, we have to include 5 and 50 also as the no 5 and no 50 are also placed in the box

Answer 2

Answer:

1/45

7/45

either 5 or 50 will include