Question

. A donation box contains slips marked with multiples of 50 as 50,100, 150, 200, 250……550. The slips are mixed thoroughly and then taken out by people to pay charity to an orphanage .A. donator takes out a slip at random. Find the probability that the selected slip contains a number which is a - a)A perfect square
b)A multiple of 10 and 20
(c) A factor of 200
d) A composite number.​

Answer 1

Step-by-step explanation:

there are total 11 slips:

a) 100 and 400 are perfect sq.

so the probability is 2/11

b) 100, 200, 300, 400, 500 are multiples of 10 and 20.

so probability is 5/11

c) 50 and 100 are factors of 200

so probability is 2/11

d) all the 11 numbers are composite as they have more than 2 factors.

so the probability is 11/11 = 1