Q4 of 31 Page 308

Which of the following cannot be the probability of an event?

A. B. –1.5


C. 15% D. 0.7

We know that probability of an event (E) is either greater than or equal to 0 and always less than or equal to one. This shows that the probability of an event can never be negative or greater than 1.

Hence,


Out of the given alternatives, -1.5 cannot be a probability of an event as it is negative which is not possible.


Hence, (B)


More from this chapter

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2

Which of the following experiments have equally likely outcomes? Explain.

(i) A driver attempts to start a car. The car starts or does not start.


(ii) A player attempts to shoot a basketball. She/he shoots or misses the shot.


(iii) A trial is made to answer a true-false question. The answer is right or wrong.


(iv) A baby is born. It is a boy or a girl.

 3

Why is tossing a coin considered to be a fair way of deciding which team should get the ball at the beginning of a football game?

 5

If P(E) = 0.05, what is the probability of ‘not E’?

 6

A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out

(i) An orange flavoured candy?


(ii) A lemon flavoured candy?