Question

Card marked with no. 5 to 50 (one no. on one card) are placed in a box mixed thorougly one card is drawn at random from the box find the probability that the no. on card taken out is (i) a prime no. less than 10 ,(ii) a no. which is a perfect square .
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Answer 1

Answer:

N(s) = 46

1) P(getting prime number less than 10) = 4/46 =2/23

2) P(getting a perfect square) = 5/46

Prime numbers less than 10 = 2,3,5,7

Perfect squares = 9,16,25,36,49

Answer 2

Answer:

(i) 2/45 (ii) 1/9

Step-by-step explanation:

(i) probability = no of selected observations / total number of observations

  so here, we have, no of selected observations as 2; namely 5 and 7

  So there are total 2 observations selected.

  Total there are 45 observations between 5 and 50

  2/45

(ii) Same ways, there are 5 square numbers, namely; 9, 16, 25, 36, 49

   So, 5/45 witch can be reduced to 1/9 by cancelling with 5.

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