1) If the true discount on s sum due 2 years hence at 14% per annum be Rs. 168, the sum due is:
A. Rs. 768 B. Rs. 968
C. Rs. 1960 D. Rs. 2400.
2)Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?
A. 2 : 3 : 4 B. 6 : 7 : 8
C. 6 : 8 : 9 D. None of these.
3)In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?
A. 266 B. 5040
C. 11760 D. 86400
E. None of these.
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1)Explanation:
ReplyDeleteP.W. =100 x T.D.=100 x 168/14 x 2= 600.
Sum = (P.W. + T.D.) = Rs. (600 + 168) = Rs. 768.
2)ans=A
Explanation:
Originally, let the number of seats for Mathematics, Physics and Biology be 5x, 7x and 8x
respectively.
Number of increased seats are (140% of 5x), (150% of 7x) and (175% of 8x).
3)Explanation:
Required number of ways= (8C5 x 10C6)= (8C3 x 10C4)
= 11760.