Question
The average weight of A, B and C is 45 kg. If the
average weight of A and B be 40 kg andthat of B and C be 43 kg, then the weight of B is :Solution
average weight of A, B and C is 45 kg (A+B+C)/3 = 45 A+B+C = 45 × 3 = 135 the average weight of A and B is 40 kg (A+B)/2 = 40 A+B = 40 × 2 = 80 the average weight of B and C is 43 kg (B+C)/2 = 43 B+C = 43 × 2 = 86 Adding A+B + B+C = 80 + 86 = 166 Subtracting A+B+C from this we get 166-135 = 31 B = 31kg
The internal, or geothermal, (1)/heat from within the Earth are (2)/ responsible for the fact that (3)/temperature increases with depth (4).
The consecration of (1)/the Eucharist, as well as (2)/the administration, (3)/were performed in English (4).
Most risk factors for (1)/pre-school overweight are modifiable (2)/and allows at-risk groups to (3)/be identified, say researchers (4).
An eye examination is called for (1)/once a year to ensure that (2)/diabetes have not resulted in retinopathy, (3)/which could lead to blindness (4).
