7394 – 1236 – 4652 = ________?
7394 – 1236 – 4652 = ________?
A. 1506
B. 1606
C. 1706
D. 1496
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In an examination, 47% failed in English and 54% failed in Mathematics. Find the pass percentage in both the subjects if 31% failed in both the subjects?
In an examination, 47% failed in English and 54% failed in Mathematics. Find the pass percentage in both the subjects if 31% failed in both the subjects?A. 70%
B. 37%
C. 53%
D. 30%If Rs. 7500 are borrowed at C. I at the rate of 4 % per annum then after 2 years, the amount to be paid is_______?
If Rs. 7500 are borrowed at C. I at the rate of 4 % per annum then after 2 years, the amount to be paid is_______?A. Rs. 8082
B. Rs. 7800
C. Rs. 8100
D. Rs. 8112
Explanation:
Amount = Rs. [7500 (1 +4/100)2]
= Rs. [7500 × 26/25 × 26/25] = Rs.8112Simple interest on a sum at 4% per annum for 2 years is Rs.80. The C.I. on the same sum for the same period is_______?
Simple interest on a sum at 4% per annum for 2 years is Rs.80. The C.I. on the same sum for the same period is_______?A. Rs.81.60
B. Rs.160
C. Rs.1081.60
D. Rs.99
Explanation:
SI = 40 + 40
CI = 40 + 40 + 1.6 = 81.6The average of 18 observations was calculated and it was 124. Later on it was discovered that two observations 46 and 82 were incorrect. The correct values are 64 and 28. The correct average of 18 observations is___________?
The average of 18 observations was calculated and it was 124. Later on it was discovered that two observations 46 and 82 were incorrect. The correct values are 64 and 28. The correct average of 18 observations is___________?A. 123
B. 137
C. 121
D. 122
Sum of 18 observations = 18×124 =2232
Correct sum of 18 observations = 2232-46-82+64+28
= 2196
Therefore, Correct average =2196/18 = 122If the cost price of 12 pens is equal to the selling price of 8 pens, the gain percent is:
If the cost price of 12 pens is equal to the selling price of 8 pens, the gain percent is:A. 25%
B. 33 1/3 %
C. 50%
D. 66 2/3 %
Explanation:
Let C.P. of each pen be Re. 1.
Then, C.P. of 8 pens = Rs. 8; S.P. of 8 pens = Rs. 12.
Gain % = 4/8 * 100 = 50%The probability that a number selected at random from the first 50 natural numbers is a composite number is__________?
The probability that a number selected at random from the first 50 natural numbers is a composite number is__________?A. 21/25
B. 17/25
C. 4/25
D. 8/25
Explanation:
The number of exhaustive events = ⁵⁰C₁ = 50.
We have 15 primes from 1 to 50.
Number of favourable cases are 34.
Required probability = 34/50 = 17/25.