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Sentences 3 and 4 have similar meaning and they are grammatically correct. 1- no other statement mentions the number of elderly people. 2- focusing on other age groups in not mentioned in any other sentences. 4- this sentence is grammatically incorrect.
‘A’ and ‘B’ can do a piece of work in 10 days and 15 days, respectively. They started working together but ‘A’ left after 3 days. Find the t...
X can do a piece of work in 15 days. He worked at it for 3 days and then Y finished it in 16 days. In how many days can X and Y together finish the work?
‘A’ and ‘B’ together can complete a work in 16 days, while ‘B’ and ‘C’ together can complete the work in...
Komal and Seema individually can complete a task in ‘2a’ hours and ‘7a’ hours respectively. If they together can complete half of the work in 7...
18 men, working 8 hours a day, can complete a task in 21 days. If a woman is 33(1/3)% less efficient than a man, how much time will it take for 24 women...
A can complete a work in 40 days. B takes 20 days less than A to complete the same work. In how many days can both of them together complete 60% of the ...
The amount of work completed by 24 men in 5 hours is equivalent to the work done by 21 women in 8 hours. A team of 33 men, working 6 hours daily, can fi...
B is thrice as efficient as A and C is 0.50 times as efficient as A. What is the ratio of number of days taken by A, B, and C when they work individually?
A can do a piece of work in 21 days and B in 28 days. If they together work on it for 5 days, then the fraction of the work that is left is :
A and B can complete a work together in 20 days. If A alone can complete one-fourth of the work in ‘x’ days and remaining work is completed ...