An army of 12000 consists of Europeans and Indians. The

Home » Aptitude » Average » Question

An army of 12000 consists of Europeans and Indians. The average height of a European is 5ft 10 inches and that
of an Indian is 5ft 9 inches and that of the whole army is 5ft 9 3 inches.
4
Then the number of Indians in the army is

Let the number of members of Indian army be n.
∴ Number of European army = 12000 – n.
According to the question,

= 5	39
	48

⇒	69n	+	70	× 12000 -	70n
	12		12		12

=	279	× 12000
	12

⇒ 69n + 840000 – 70n = 837000
⇒ n = 840000 – 837000 = 3000

of an Indian is 5ft 9 inches and that of the whole army is 5ft 9	3	inches.
	4