Question

1. A bag contains 3 red balls and 5 black balls. A ball is drawn at random from
What is the probability that the ball drawn is (i) red (ii) not red

2.A box contains 5 red marbles , & white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble take out will be
(i) red? (ii) white? (iii) not green?

3. A piggy bank contain hundred 50p coins , fifty | Re coins , twenty 2 Rs coins and ten 5 Rs 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 thecoin (i) will be a 50 p coin? (ii) will not be a 5 Rs coin?

4. 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 What is the probability that the fish taken out is a male fish?

5. 12 defective pens are accidently mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective One pen is taken out at random from this lot Determine the probability that the pen taken out is a good one.

6. A lot of 20 bulbs contain 4 defective ones One bulb is drawn at random from the lot
What is the probability that the bulb is defective?

7. Suppose the bulb is drawn at random (from 20 bulbs which contains 4 defective ones) is
not defective and is not replaced Now one bulb is drawn from the rest. What is the probability that this bulb is not defective?

8. A box contains 90 diss which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears (i) a two digit number (ii) a perfect
square number (iii) a number divisible by 5.

9. In a musical chair game, the person playing the music has been advised to stop playing
the music at any time within 2 minutes after she starts playing What is the probability that the music will stop within the first half-minute after starting?

10.A) What is the probability that an ordinary year has 53 Sundays?
B) What is the probability that a leap year has 53 Sundays?​

Answer 1

Answer:

1- 1/8

2 - 1/13

Step-by-step explanation:

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