Question

ii. Question 4: A Box contains 5 red, 3 white and 4 blue balls. If the balls are picked at random: What is the probability of picking a blue ball at the first draw? i. ******* ii. (2 Marks) Question 5: What is the probability of throwing the following when a die is rolled once. i. Throwing a 6. (2 Marks) What is the probability of picking a white ball at the first draw without replacement and a blue ball in the second draw? Throwing a number greater than 4? (2 Marks) (2 Marks) Question 6: What is the probability of throwing a double number if two dice are thrown once?​

Answer 1

total number of balls 3+4+5=12

no.of blurry balls=4

4/12=1/3

Answer 2





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Question



A bag contains 3 red, 4 white and 5 blue balls. If two balls are drawn at random, then the probability that they are of different colours, is

A

6647

B

3323

C

13247

D

3347

E

3370

Medium

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Solution



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Correct option is A)

Total number of bassl =3+4+5=12

Favourable number of cases are total minus the balls drawn from same colour

12C2−(3C2+4C2+5C2)

=66−(3+6+10)=66−19=47

Total number of cases =12C2=66

Hence the required probability

=Tota