Question
 The average age of 12 boys in a group is 8 years. If
3 more boys join the group, the average is increased by 1 year. What is the average age (in years) of the three new boys in the group?Solution
The average age of 12 boys in a group=8 years Total Age =12×8=96 years 3 more boys join the group so the total boys =12+3=15 boys And increased average by 1=8+1=9 years So total age of 15 boys =15×9 =135 years total age of new 3 boys =135-96=39 years average age of new 3 boys = 39/3=13 years Â
More Age Questions
Simplify the following expression:-
32% of 450 + 60% of 150 = ? × 9
- Find the value of the expression:
25 + 9 – 8 × [10 + 14 – 2 × (33 – 18)] (82 + 62 ) × 1.25 + 20% of 145 = ? – 40% of 65Â
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(2 ÷ 3) × (4 ÷ 12) × (? ÷ 10) × 45 × (1 ÷ 5) = (? ÷ 6) + (2 ÷ 5)
(342 – 20% of 5280) = ? ÷ 3
20% of 550 × 25% of 80 = ?2 × 22
Find the value of.
( ∛ ∛ 343 )3 × ( ∛ ∛216 )3
