Question
The average weight of 16 people in a group is 75 kg. If
the heaviest person who weighs 95 kg is replaced by a new person, and the average weight of the group drops to 73 kg, what is the weight of the new person?Solution
Total weight of 16 people = 16 × 75 = 1200 kg. Let the weight of the new person be y kg. Removing the heaviest person (95 kg) and adding the new person: New total weight = 1200 - 95 + y New average weight with the new person is 73 kg 1200 - 95 + y = 73 × 16 1200 - 95 + y = 1168 y = 1168 - 1105 y = 63 = 63 kg
(26)2 = {(20% of 40% of 18200) ÷ ?} × 1664 ÷ 128Â
Determine the value of 'p' in the expression.
28 ÷ 22p + 1 = 43Â
√(?) = (897 × 51) ÷ 1016.6
- What will come in place of the question mark (?) in the following questions?
What will come in place of (?), in the given expression.
√2500 + 12² – 144 ÷ 6 = ? 84% of 8400 + 42% of 6120 =?
(√ 121 x 41) + (3√343 x √289 ) = ? x 19  Â
√ 225 x 24 - √ 144 x 18 = ?
What will come in the place of question mark (?) in the given expression?
(3.2 × 35 + ?) ÷ √16 = 38.5
