A. 0.03375
B. 0.3375
C. 3.375
D. 33.75
Explanation:
(25/100) * (30/100) * (45/100)
1/4 * 3/10 * 9/20
27/800 = 0.03375
A. 10%
B. 11%
C. 21%
D. 100%
Explanation:
Suppose I Purchased 110 books
C.P = Rs. (10/11 × 110) = Rs. 100
S.P = Rs. (11/10 × 110) = Rs. 121
Gain % = 21%
A. 1
B. 5
C. 10
D. 25
10 workers make 10 tables in 10 days. 1 worker makes 1 table in 10 days. Similarly, 5 workers can make 5 tables in 10 days.
A. Rs. 6500
B. Rs. 7225
C. Rs. 8700
D. Rs. 1390
Explanation:
x – [40 % of x + 25 % of x + 15 % of x + 5 % of x] = 1305
or x – 85 % of x = 1305
or 15 % of x = 1305 x 130500/15 × 8700
= Rs. 8700
A. 7/12
B. 5/9
C. 1/36
D. 5/12
Explanation:
No two dice show same number would mean all the three faces should show different numbers. The first can fall in any one of the six ways. The second die can show a different number in five ways. The third should show a number that is different from the first and second. This can happen in four ways.
Thus 6 * 5 * 4 = 120 favourable cases.
The total cases are 6 * 6 * 6 = 216.
The probability = 120/216 = 5/9.
A. 10
B. 8
C. 15
D. 7.50
Explanation:
Let the price of each note book be Rs.x.
Let the number of note books which can be brought for Rs.300 each at a price of Rs.x be y.
Hence xy = 300
=> y = 300/x
(x + 5)(y – 10) = 300 => xy + 5y – 10x – 50 = xy
=>5(300/x) – 10x – 50 = 0 => -150 + x2 + 5x = 0
multiplying both sides by -1/10x
=> x2 + 15x – 10x – 150 = 0
=> x(x + 15) – 10(x + 15) = 0
=> x = 10 or -15
As x>0, x = 10
A. 12%
B. 13%
C. 15%
D. 14%