Q5 of 54 Page 320

A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1.2.3.4.5.6.7.8 (Sec figure), and these are equally likely outcomes. What is the probability that it will point at


8?

There are total 8 numbers.

⇒ We can get 8, one times only.


∴ number of favourable cases = 1


⇒ Probability that arrow will point 8 –


⇒ P(arrow will point 8) =


⇒ P(arrow will point 8) =


∴ Probability that arrow will point 8 will be .


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3

A kiddy bank contains hundred 50p coins. Fifty DI coins, twenty D2 coins and ten D5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down. What is the probability that the coin.

will not be a D5 coin?

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Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish (See figure). What is the probability that the fish taken out is a male fish?

 5

A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1.2.3.4.5.6.7.8 (Sec figure), and these are equally likely outcomes. What is the probability that it will point at


an odd number?

 5

A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1.2.3.4.5.6.7.8 (Sec figure), and these are equally likely outcomes. What is the probability that it will point at


a number greater than 2?