Mathematics Mcqs

5% people of a village in Sri Lanka died by bombardment, 15% of the remainder left the village on account of fear. If now the population is reduced to 3553, how much was it in the beginning?

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5% people of a village in Sri Lanka died by bombardment, 15% of the remainder left the village on account of fear. If now the population is reduced to 3553, how much was it in the beginning?

A. 3800
B. 4200
C. 4400
D. 5500

Explanation:
X * (95/100) * (85/100) = 3553
X = 4400

A salesman’s terms were changed from a flat commission of 5% on all his sales to a fixed salary of Rs.1000 plus 2.5% commission on all sales exceeding Rs. 4,000. If his remuneration as per new scheme was Rs. 600 more than that by the previous schema, his sales were worth?

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A salesman’s terms were changed from a flat commission of 5% on all his sales to a fixed salary of Rs.1000 plus 2.5% commission on all sales exceeding Rs. 4,000. If his remuneration as per new scheme was Rs. 600 more than that by the previous schema, his sales were worth?

A. Rs. 14,000
B. Rs. 12,000
C. Rs. 30,000
D. Rs. 40,000
Explanation:
[1000 + (X-4000) * (2.5/100)] – X * (5/100) = 600
X = 12000

A and B’s salaries together amount to Rs. 2,000. A spends 95% of his salary and B spends 85% of his. If now their savings are the same, what is A’s salary?

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A and B’s salaries together amount to Rs. 2,000. A spends 95% of his salary and B spends 85% of his. If now their savings are the same, what is A’s salary?

A. Rs.500
B. Rs.750
C. Rs.1250
D. Rs.1500
Explanation:
(5/100) A = (15/100) B
A = 3B
A + B = 2000
4B = 2000 => B = 500
A = 1500

The tax on a commodity is diminished by 20% and its consumption increased by 15%. The effect on revenue is_________?

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The tax on a commodity is diminished by 20% and its consumption increased by 15%. The effect on revenue is_________?

A. It increases by 8%
B. It decreases by 8%
C. No change in revenue
D. It increases by 10%
E. None
100 * 100 = 10000
80 * 115 = 9200
———–
10000———–800
100———–? => 8% decrease