Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Q: Problem: the average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. find the initial number of members in the group ?
Options: a. 87, b. 67, c. 23, d. 75, e. 25

A: c
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Q: Problem: an aeroplane covers a certain distance at a speed of 150 kmph in 2 hours. to cover the same distance in 1 2 / 3 hours, it must travel at a speed of :
Options: a. 1300 kmph, b. 160 kmph, c. 180 kmph, d. 1080 kmph, e. none

A: c
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Q: Problem: two employees x and y are paid a total of rs. 700 per week by their employer. if x is paid 120 percent of the sum paid to y, how much is y paid per week ?
Options: a. s. 200.18, b. s. 240.18, c. s. 290.18, d. s. 300.18, e. s. 318.18

A:
e
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