## Probability Questions for SBI Clerk

### Probability Questions for SBI Clerk 2015 Exam

**Study the following information carefully to answer the questions that follow. A box contains 2 blue caps, 4 red caps, 5 green caps and 1 yellow cap: (SBI Clerk 2015)**

**1.** If four caps are picked at random, what is the probability that none is green ?

(a)

(b)

(c)

(d)

(e) None of these

**2. **If three caps are picked at random, what is the probability that two are red and one is green ?

(a)

(b)

(c)

(d)

(e) None of these

**3. **If one cap is picked at random, what is the probability that it is either blue or yellow?

(a)

(b)

(c)

(d)

(e) None of these

**Probability Questions for SBI Clerk 2015 Answers**

**1.** (a) Total number of caps = 12

Total result n(S)

n(S)

n(E_{1}) = Out of 5 caps, number of ways to not pick a green cap

n(E2) = Out of 7 caps, number of ways to not pick up 4 caps

p(E)

**2. **(b) Total number of caps = 12

n(S)

n(E_{1}) = Out of 4 red caps, number of ways to pick 2 caps

n(E_{2}) = Out of 5 green caps, number of ways to pick one cap

**3. **(b) Total number of caps = 12

n(S)

Out of (2 blue + 1 yellow) caps number of ways to pick one cap n(E)

Required probability p(E)

### Probability Questions for SBI Clerk 2012 Exam

**1. **In how many different ways can the letters of the word ‘CREAM’ be arranged ?

(a). 720

(b). 240

(c). 360

(d). 504

(e). None of these

**Probability Questions for SBI Clerk 2012 Answers**

**1. **(e)

C R E A M

1 2 3 4 5

Required number of ways = 5!

= 5 × 4 × 3 × 2 × 1 = 120

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