Probability Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 6

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

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

---

If three marbles are picked at random, what is the probability that at least one is blue ?

a) $37/44$

b) $7/44$

c) $7/12$

d) $5/12$

e) None of these

Answer »

Question : 7

3 digits are chosen at random from 1,2,3,4,5,6,7,8 and 9 without repeating any digit. What is the probability that their product is odd?

a) $5/108$

b) $8/42$

c) $2/3$

d) $5/42$

e) $9/42$

Answer »

Question : 8

There are 4 boys and 4 girls. They sit in a row randomly. What is the chance that all the girls do not sit together?

a) $13/14$

b) $15/16$

c) $12/13$

d) $14/15$

e) None of these

Answer »

Question : 9

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

A box contains 2 blue caps, 4 red caps, 5 green caps and 1 yellow cap.

---

If two caps are picked at random, what is the probability that at least one is red ?

a) $16/21$

b) $7/19$

c) $1/3$

d) $19/33$

e) None of these

Answer »

Question : 10

Out of 15 students studying in a class, 7 are from Maharashtra, 5 from Karnataka and 3 from Goa. Four students are to be selected at random. What are the chances that at least one is from Karnataka?

a) $11/13$

b) $51/15$

c) $12/13$

d) $100/15$

e) None of these

Answer »