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Let the efficiency of A and B be 15 units per day and 17 units per day, respectively. So, total amount of work = (15 + 17) X 30 = 960 units Time taken by A alone to compete the whole work = 960/15 = 64 days Hence, option c.
A park has an average of 140 visitors on Sundays and 80 on other day. The average number of visitors in a month of 30 days starting with Sunday is
The following dataset represents the examination scores achieved by 10 students:
36, 91, 80, 77, 64, 80, 45, 56, 41, 96
Find the last digit of (12123 – 1).
A person distributes pens among his three friends A, B and C in the ratio 1/5 : 1/6: 1/8 . What is the minimum number of pens that the persons should have?
What is the average of first 28 multiples of 2.8?
If the first term is 125 and the common ratio is 2/5, then what will be the fourth term of the geometric progression (GP)?
27 percent of a number exceeds 13 percent of the same number by 56. What is the value of the number?
If the square root of 1024 is added to 30% of a number we get 4 less than 2/5th of the number. What is 3/8th of the number?
