Question

Some couples arrive for a party. Each person shakes hands with others except for respective husbands &
wives. If there are 420 such shake hands, then number of persons in the party are
(a) 20
(b) 30
(c) 40
(d) None of these​

Answer 1

Answer:

none of these is the correct answer

Step-by-step explanation:

because there is nothin that shows total couples in party