1 Answers

Option 3 : 60

Given:

Average presence of students on Monday, Tuesday and Wednesday = 32

Average presence of students on Wednesday, Thursday, Friday and Saturday = 30

Average presence of students of all six days = 26

Formula:

Average = Sum of all observation/Total number of all observation

Calculation:

Sum of the presence of students on Monday, Tuesday and Wednesday = 3 × 32 = 96

Sum of the presence of students on Wednesday, Thursday, Friday and Saturday = 4 × 30

= 120

Sum of the presence of students of all six days is = 6 × 26 = 156

∴ Presence of students on Wednesday = (96 + 120) – 156 = 60

5 views

Related Questions