25 2/5 + 8 4/5 + 4/5 = _________?
25 2/5 + 8 4/5 + 4/5 = _________?
A. 34
B. 35
C. 36
D. 37
Explanation:
25 2/5 + 8 4/5 + 4/5 = 34 4/5 ≡ 35
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183.21 + 2.9928 * 66.84 = _______?
183.21 + 2.9928 * 66.84 = _______?A. 383
B. 372
C. 380
D. 374
Explanation:
? = 183.21 + 200 = 383The monthly incomes of A and B are in the ratio 5 : 2. B’s monthly income is 12% more than C’s monthly income. If C’s monthly income is Rs. 15000, then find the annual income of A?
The monthly incomes of A and B are in the ratio 5 : 2. B’s monthly income is 12% more than C’s monthly income. If C’s monthly income is Rs. 15000, then find the annual income of A?A. Rs. 420000
B. Rs. 180000
C. Rs. 201600
D. Rs. 504000
E. None of these
Explanation:
B’s monthly income = 15000 * 112/100 = Rs. 16800
B’s monthly income = 2 parts —-> Rs. 16800
A’s monthly income = 5 parts = 5/2 * 16800 = Rs. 42000
A’s annual income = Rs. 42000 * 12 = Rs. 504000A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in___________?
A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in___________?A. 8 days
B. 10 days
C. 12 days
D. 15 days
(A.+ B)’s 1 day’s work = ( 1/15 + 1/10 ) = 1/6 Work done by A and B in 2 days = ( 1/6 X 2 ) = 1/3 Remaining work = ( 1 – 1/6 ) = 2/3
Now, 1/15 work is done by A in 1 day. so 2/3 work will be done by A in ( 15 X 2/3 ) = 10 days Hence, total time taken = (10 + 2) = 12 days.The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?
The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?A. 72
B. 45
C. 37
D. 79
Explanation:
Sum of the marks for the 12 students = 12 * 36 = 432. The marks of each student are doubled, the sum also will be doubled.
The new sum = 432 * 2 = 864. So, the new average = 864/12 = 72A student has to opt for 2 subjects out of 5 subjects for a course. Namely commerce, economics, statistics, mathematics 1 and Mathematics 2, Mathematics 2 can be offered only if mathematics 1 has also opted. The number of different combinations of two subjects which can be opted is_________?
A student has to opt for 2 subjects out of 5 subjects for a course. Namely commerce, economics, statistics, mathematics 1 and Mathematics 2, Mathematics 2 can be offered only if mathematics 1 has also opted. The number of different combinations of two subjects which can be opted is_________?A. 5
B. 6
C. 7
D. 18Explanation:
Number of ways of opting a subject other than Mathematics II = 4C2. = 4x3x2!/2!x2 = 6.
Number of ways of selection of Mathematics II = 1
Therefore, Total Number of ways = 6+1 =7.A man invested Rs. 1552 in a stock at 97 to obtain an income of Rs. 128. The dividend from the stock is___________?
A man invested Rs. 1552 in a stock at 97 to obtain an income of Rs. 128. The dividend from the stock is___________?A. 7.50%
B. 8%
C. 9.70%
D. None of these.
By investing Rs. 1552, income = Rs. 128. By investing Rs. 97, income = Rs.( 128/1552 X 97 ) = Rs. 8. So Dividend = 8%