Question

A box contain card number 1 to 50 a card is drawn at random from the box find the probability that the number of the grand a square number a multiple of 7

Answer 1

Numbers which are perfect square between 1 to 90=1,4,9,16,25,36,49,64,81

Total no.of these outcomes=9

(i)Probability of a number getting a perfect square=9/90=0.1

Numbers which are multiple of 7 between 1 to 90=7,14,21,28,35,42,49,56,63,70,77,84

Total no.of these outcomes=12

(ii)Probability of a number getting multiples of 7=12/90=0.133

Answer 2

Hii....

Here you go...!!
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Given,
Sample space =(S) ={1 to 50 numbers}
n(S) = 50

1] Event A:
Event A is that the number of the grand a square number.

Here square numbers are 1,4,9,16,25,36,49

A={ 1,4,9,16,25,36,49}
n(A) =7

P(A) =n(A) /n(S)
P(A) =7 / 50


2] Event B:
Event B is that numbers are multiple of 7

Here multiple of 7 are 7,14,21,28,35,42,49

B={7,14,21,28,35,42,49}
n(B) =7

P(A) = n(B) /n(S)
P(A) = 7 / 50

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