Question
The average weight of 40 students in a class is 60 kg. A
group of students with average weight 50 kg joins the class, and the overall average becomes 58 kg. How many students are there in the group?Solution
ATQ, Let x be the number of new students. Initial total weight = 40 × 60 = 2400. New group’s total weight = 50x. New average = 58 ⇒ (2400 + 50x) / (40 + x) = 58 2400 + 50x = 58(40 + x) = 2320 + 58x 2400 − 2320 = 58x − 50x 80 = 8x ⇒ x = 10.
- Select the option figure which is embedded in the given figure. (rotation is NOT allowed).
From the given answer figures, select the one in which the question figure is hidden / embedded(rotation is not allowed).
Select the option figure which is embedded in the given figure. (Rotation is not allowed).
Select the option figure in which the given figure is embedded as its part (rotation is NOT allowed).
Select the option figure which is embedded in the given figure. (Rotation is not allowed).
From the given answer figures, Select the one in which the question is hidden/embedded.
Find out that answer figure in which the question figure is embedded.
