CAT4MBA

There are 5 letters and 5 envelopes

Q1. Find the number of ways in which only two letters go in the right place?
a. 60
b. 125
c. C(5,1) + C(5,2) + C(5,3)
d. P(5,1) + P(5,2) + P(5,3)
e. None of these

Q2. Find the number of ways in which only one letter goes in the wrong place?
a. 5^4
b. C(5,1) + C(5,2) + C(5,3) + C(5,4) + C(5,5)
c. C(5,0) + C(5,1) + C(5,2) + C(5,3) + C(5,4)
d. 0
e. None of these

Q3. Find the number of ways in which only three letters go in the wrong place?
a. 60
b. 125
c. C(5,1) + C(5,2) + C(5,3)
d. P(5,1) + P(5,2) + P(5,3)
e. None of these

Q4. In how many ways can wrong choices be made?
a. 5^4
b. 5! – 1
c. 25
d. 5^5 – 1
e. None of these