A jar contains 54 marbles each of which is blue green or white. The probability of selecting a blue marble at random from the jar is 1/3 and the probability of selecting a green marble at random is 4/9. How many white marbles does the jar contain.
The probability of selecting a blue marble – 1/3 =Blue/54 Blue= 18 Now the probability of selecting a green marble – 4/9 =Green /54 Green = 24 Total number of white balls =54-(18+24) =12
'B' and 'C' in a team can complete a piece of work in 25 days and on other hand 'B' alone can do the same work in 40 days. If they started the work in...
Efficiency of A, and B are in the ratio of 3 : 4. If both can do a work together in 30 days. Find out how much days A will take to complete the work alone?
A, B and C can complete the whole work in 20 days. A starts the work and works for ‘x’ days while B and C complete the remaining 3/5 of the ...
If 15 women or 18 men or 12 boys can do a piece of work in 18 days of 10 hours each, find how many boys assisted by 5 women and 6 men will finish the sa...
A does 1/2 work and B does 3/4 work in the same time. Difference between number of days taken by A and B to work alone to complete the work individually...
Ratio of the work done by P, Q and R in one day is 6:4:7 respectively. They all together can complete the work in 45 days. Q and R worked on it for 27 d...
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 P is assisted by Q a...
A can finish a job in 20 days while B can finish same job in 30 days. A and B both worked for 5 days and C joins them. In next 3.5 days, all three have ...
55 men can complete a piece of work in 12 days. 15 men started the same work and worked for 10 days, and then joined by ‘x’ more men such that the r...
Ratio of the work done by P, Q and R in one day is 7:4:9 respectively. They all together can complete the work in 44 days. Q and R worked on it for 30 d...
