An army of 12000 consists of Europians and Indians. The average height Of European if 5ft 10 inches and that of an Indian is 5ft 9inches and that of the whole army if 5 ft 39/4 inches. Then the number of Indians in the army is?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1
Let the no. of Indians in the army = x
No. of Europians in the army = 12000 - x
ATQ
(12000 - x)(5 + 10/12) + x(5+9/12) = 12000(5 + 59/(4×12))
70000 - 35x/6 + 23x/4 = 69750
70000 - 35x/6 +23x/4 = 69750
250 = x/12
x = 3000