Question

In a meeting of 25 boys, each boy is required to shakehands with the other. Then how many total hand shake will be there?

• A. 225
• B. 300
• C. 145
• D. 350

Answer 1

Answer:

B. 300

Number of shake hands=n(n-1)/2 =25(25-1) /2 25x24/2=300