A train time table must be compiled for various days of the week, so that two trains twice a day depart for three days, one train daily for two days, and three trains once a day for two days. How many diferent time table can be compiled?

A train time table must be compiled for various days of the week, so that two trains twice a day depart for three days, one train daily for two days, and three trains once a day for two days. How many different time tables can be compiled? a. 140 b. 210 c. 133 d. 72

A 24 - hour day is how many times as long as 60 seconds ?

Pooja and Ritu can do a piece of work in 174 days. If one day work of Pooja be three fourth of one day work of Ritu, find in how many days each will do the work alone.

A and B together can do a piece of work in 15 days. If one day's work of A be 1 (1)/(2) times one day's work of B, find how many days will each take to finish the work alone?

A radioactive sample is decayed 20% in one day. After next two days, the undecayed percentage of nuclei will be

A and B can do a piece of work in 12 days, B and C in 15 days, and C and A in 20 days. How much time will A alone take to finish the job ?

A man can work 8 hours daily and finishes a work in 12 days. If he works 6 hrs daily, in how many days will the same work be finished?

Given a group of 4 persoms , find the probability that no two of them have their birthdays on the same day of the week,

Pooja and Ritu can do a piece of work in 17.(1)/(7) days. If one day work of Pooja be three fourth of one day work of Ritu. Find in how many days each will do the work alone.

A new music video on the web received 2,78, 946 hits the first day and 3,17,823 hits the second day. How many his did the video receive in all during the two days?