[PPSC SCIENTIFIC ASSISTANT (POLYGRAPH)]
16. If the numerator of a fraction is increased by 150% and the denominator of the fraction is increased by 350%, the resultant fraction is 25/51, what is the original fraction?
11/17
11/15
15/17
13/15
17. Two taps can fill a tank in 20 minutes and 30 minutes respectively. There is an outlet tap at exactly half level of that rectangular tank which can pump out 50 litres of water per minute. If the outlet tap is open, then it takes 24 minutes to fill an empty tank. What is
1800 litres
1500 litres
1200 litres
2400 litres
18. If the sides of an equilateral triangle are shortened by 12 cms, 13 cms and 14 cms respectively, a right-angle triangle is formed. Find the length of the side of the equilateral triangle.
18 cms
15 cms
17 cms
19 cms
19. A man and his wife appear in an interview for two vacancies in the same post. The probability of husband’s selection is 1/7 and the probability of wife’s selection is 1/5. What is the probability that only one of them is selected?
4/5
2/7
8/15
4/7
20. Here are some words translated from an artificial language. gorblflur means floor carpet pixngorbl means wooden floor arthtusl means rack ceiling
Which word could mean "wooden rack"?
gorbltusl
flurgorbl
arthflur
pixnarth