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If ‘n’ fair coins are tossed, Total number of outcomes in the sample space = 2n The probability of getting exactly ‘r’ number of heads when ‘n’ coins are tossed =nCr/ 2n Therefore, probability = 5C3/25 = 5/16
A, B, and C can finish work in 5 days, 10 days, and 15 days, respectively, working alone. A and B work on the first day, A and C work on the second day,...
A and B together can complete a work in 7.2 days, while B and C together can complete the same work in 12 days. If A is twice efficient than C, then fin...
‘A’ alone can do some work in 13 days. ‘B’ and ‘C’ together can do the same work in 18 days. If ‘B’ is half as efficient as ‘A’, the...
There are three taps of diameter 2 cm, 3 cm, and 4 cm, respectively. The ratio of the water flowing through them is equal to the ratio of the square of ...
Ajay started a work and left working after 8 days. Vijay finished the remaining work in next 36 days. Had Ajay left the work after working for 12 days t...
A and B can complete a work together in 30 days. If A alone can complete one-third of the work in ‘x’ days and remaining work is completed b...
Anil and Ashish receive Rs.2000 for work of 10 days. If Anil is 4 times efficient than Ashish, then find the daily wage received by Ashish.
P can do a piece of work in 30 days. Q do the same work in 40 days. R can do it in 35 days. P and R worked for 4 days and handed it to Q. Q worked for s...
P, Q, and R can complete a work in 12 days. 15 days and 30 days, respectively, working alone. How soon can the work be completed if Q is assisted by P a...
