Probability Model Questions Set 1 Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

A basket contains three blue and four red balls. If three balls are drawn at random from the basket, what is the probability that all the three are either blue or red ?

a) $1/7$

b) $3/28$

c) 1

d) $3/14$

e) None of these

Question : 2

In a box carrying one dozen of oranges, one-third have become bad. If 3 oranges are taken out from the box at random, what is the probability that at least one orange out of the three oranges picked up is good?

a) $54/55$

b) $3/55$

c) $1/55$

d) $45/55$

e) None of these

Question : 3

Directions :
Study the given information carefully and answer the questions that follow.

A basket contains 4 red, 5 blue and 3 green marbles.

a) $1/2$

b) $1/6$

c) $3/7$

d) $2/11$

e) None of these