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Let A be the event of School A wins Let B be the event of School B wins Then A’ = Event of the School A fails and B’ = Event of the School B fails Therefore P(A’) = 1 - 3/7 = 4/7 P(B’) = 1 - 3/5 = 2/5 Required Probability = P(A) × P(B’) + P(B) × P(A’) = 3/7 × 2/5 + 3/5 × 4/7 = 6/35 + 12/35 = 18/35
Amit is 66(2/3)% more efficient than Vivek who can do the same work in 25% more time than Sameer. If Amit and Sameer together can complete 70% of work ...
Ratio of the work done by P, Q and R in one day is 8:5:9 respectively. They all together can complete the work in 40 days. Q and R worked on it for 32 d...
Anil, Anshika and Anamika can do a certain piece of work in 64 days, 72 days and 96 days, respectively. All of them started working together but after _...
If a task can be completed by either 10 boys or 12 girls in 10 days, how long will it take for a team of 5 boys and 2 girls worki...
A can complete a work in 12 days, and B can complete the same work in 18 days. How many days will they take to complete the work if they work together?
If 20 men or 12 boys can complete a job in 25 days, how long will it take for a team of 15 men and 18 boys to complete the same job? (Calculate approxim...
P and Q together can do a piece of work in 30 days, Q and R together can do it in 20 days. P starts the work and works on it for 5 days, then Q takes it...
Working together, A and B can do a certain work in 45 days. They work together for 10 days. They complete the remaining work in 28 days with the assista...
A man does double the work done by a boy in the same time. The number of days that 3 men and 4 boys will take to finish a work which can be done by 10 m...
‘A’ and ‘B’ can complete a certain work in 20 days and 10 days, respectively. They started working together and worked till completion of the wo...
