Question

A person made 165 telephone calls in the month of May in a year . it was friday on 1st may of the year . The average of telephone calls on Sundays of the month was 7. What was the average of the telephone calls per day on the rest of the rest days of the month​ ?​

Answer 1

$\huge\underline\bold {Answer:}$

Since it was a Friday on 1sf May of the year, there are 5 Sundays in that month, 3rd, 10th, 17th, 24th and 31st.

Therefore number of telephone calls on Sundays

= 7 × 5

= 35

Therefore remaining number of telephone calls

= 165 – 35

= 130

Hence the average of the telephone calls per day on the rest days of the month is 130/26

= 5.

Answer 2

Since it was a Friday on 1st May of the year
there are 5 Sundays in that month, 3rd, 10th, 17th,
24th, and 31st
∴ Number of telephone calls on Sundays
=7x5=35
∴ Remaining number of telephone calls
=165−35=130
Required average = 130/26
= 5