The number of boys invited were lesser by 2 in comparison to girls

In a birthday party a father invited his son’s friends. The number of boys invited were lesser by 2 in comparison to girls. The father gave Rs. 10 each to boy and Rs. 20 each to girl. If he spent a total of Rs. 280, how many boys were invited?
(a) 8
(b) 10
(c) 12
(d) 14

Anurag Mishra Professor Asked on 21st February 2016 in Reasoning Questions.
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2 Answer(s)

A

Manoj Default Answered on 23rd February 2016.
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Answer: (a) 8. 

Solution:-
Let the number of girls be X

The number of boys invited were lesser by 2 in comparison of girls.
Then, number of boys = X – 2

The father gave Rs. 10 rupees each to boys and Rs. 20 each to girl. If he total spent Rs. 280.
Then,  20 X + (X – 2) 10 = 280
20 X + 10 X – 20 = 280
30 X = 280 + 20
30 X = 300
X = 300/30
X = 10

Then, the number of boys X – 2 = 10 – 2 = 8.

Hence, the correct answer is (a) 8.

Anurag Mishra Professor Answered on 25th February 2016.
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