Q10 of 36 Page 126

In a game of chance, a spinning arrow comes to rest at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8.

All these are equally likely outcomes.


Find the probability that it will rest at


(1) 8.


(2) an odd number.


(3) a number greater than 2.


(4) a number less than 9.


(1) Probability that it will rest at 8=


(2) Probability that it will rest at an odd number, p(O) =


p(O)=


(3) Probability that it will rest at a number greater than 2, p(E) =


p(E)=


(4) Probability that it will rest at a number less than 9, p(E) =


p(E)=


More from this chapter

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8

A box contains 30 tickets, bearing only one number from 1 to 30 on each. If one ticket is drawn at random, find the probability of an event that the ticket drawn bears

(1) an odd number


(2) a complete square number.

 9

Length and breadth of a rectangular garden are 77 m and 50 m. There is a circular lake in the garden having diameter 14 m. Due to wind, a towel from a terrace on a nearby building fell into the garden. Then find the probability of the event that it fell in the lake.

 11

There are six cards in a box, each bearing a number from 0 to 5. Find the probability of each of the following events, that a card drawn shows,

(1) a natural number.


(2) a number less than 1.


(3) a whole number.


(4) a number is greater than 5.

 12

A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball drawn is -

(1) red.


(2) not red


(3) either red or white.