Question

A number is chosen at random from the number –3, –2, –1, 0, 1, 2, 3. What will be the probability that square of this number is less then or equal to 1?

Answer 1

SOLUTION :  

Given : Numbers are - 3 , -2, -1, 0, 1, 2, 3

Total number of outcomes = 7

Let E = Event of getting a number whose square is less than or equal to 1

Numbers whose square is less than or equal to 1 : -1 ,1, 0

Number of outcome favourable to E = 3

Probability (E) = Number of favourable outcomes / Total number of outcomes

P(E) = 3/7  

Hence, the required probability of getting a whose square is less than or equal to 1,  P(E) = 2/7

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Answer 2

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