Question
Average age of a class of 33 students is 14
years. Average age of the class is increased by 18 months if the age of the teacher is included. Find the age of the teacher.Solution
Sum of the ages of all the students in the class = 33 × 14 = 462 years
Sum of the ages of the students along with teacher = 34 × 15.5 = 527 years
So the age of the teacher = 527 – 462 = 65 years
More Average Questions
What should come in place of (?) question mark in the following number series.
4, 9, 19, 34, 54, ?
?, 15, 45, 225, 1575, 14175
62, 87, 137, ?, 312, 437
In each of the following number series, one term is missing. Find the missing term.
2, 6, 12, 20, ?, 42
A series given below follows a certain pattern,
1800, 469, (?), 855, 980, 953
If (?) = B – 2, then find the nearest cube root of B.
What will come in place of the question mark (?) in the following series?
9, 22, 61, ?, 217, 334
129, 224, 355, 528, ?, 1024
289    169      121       ?      25       9
...18, 30, 46, 66, 90, ?
Find the next term in the series:
3, 10, 21, 36, 55, ?
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