Q7 of 54 Page 320

Five cards- the ten jack. Queen. King and ace of diamonds. Are well- shuffled with their face downwards. One card is selected at random.

What is the probability that the card is the queen?

total cards = 5

⇒ Total cases while drawing a card at random = 5


⇒ There is one queen.


⇒ So favourable case for getting a queen = 1


⇒ probability that the card is the queen –


⇒ P( card is queen ) =


⇒ P( card is queen ) =


∴ Probability the card is queen =


More from this chapter

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6

One card is selected from a well-shuffled deck of 52 cards. Find the probability of getting

a spade

 6

One card is selected from a well-shuffled deck of 52 cards. Find the probability of getting

the queen of diamonds

 7

Five cards- the ten jack. Queen. King and ace of diamonds. Are well- shuffled with their face downwards. One card is selected at random.

If the queen is selected and put aside (without replacement). What is the probability that the second card selected is (a) an ace ? (b) a queen ?

 8

12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.