Question
The average age of 24 children and their teacher's age
are 21 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?Solution
Sum of the age of total children and teacher = 25 × 21 = 525 Sum of the age of children after excluding = 24 × 20 = 480 Teacher’s age = 525 – 480 = 45 years
More Average Questions
17 ? 33 44 57 72
...12 23 65 ? 1239 7409
...A factory produces two types of gadgets: Type A and Type B. In a day, it produces 300 Type A gadgets and 400 Type B gadgets. If the production cost of T...
3, 4, 10, 33, 136, ?, 4116
83, 88, 86, 91, 89, ?
51Â Â Â 86Â Â Â 121Â Â Â 156Â Â Â 191Â Â Â ?
13 15 ? 63 143 293
...13Â Â Â Â Â Â Â Â Â Â 182Â Â Â Â Â Â Â Â 303Â Â Â Â Â Â Â Â 384Â Â Â Â Â Â Â Â 433Â Â Â Â Â Â Â Â ?
...24 47 137 ? 2679 16049
...148, ‘?’ , 15 4 , 17 8 , 23 8 , 35 8 , 56 8
Relevant for Exams:
