We can choose balls as black, red or red black alternately, Required probability = 2 × (3/6 × 3/5 × 2/4 × 2/3 × 1/2 × 1) = 1/10
138 unit of work can be completed by P alone in 23 days. P started working alone and joined by Q after 11 days such that they completed the remaining wo...
A can complete a piece of work in 10 days. B in 15 days and C in 20 days. A and C worked together for two days and then A was replaced by B. In how many...
Akhil and Nikhil together can complete a work in 10 days while Nikhil alone takes 20 days to complete 40% of the work. If the efficiency of Sachin is 25...
A 40 hectare field is reaped by 4 men, 6 women and 8 children together in 10 days. If working capabilities of a Man, a Woman and a Child are in the rati...
Ram can do a piece of work in 50 days. He alone worked at it for 20 days and then Lakshman completed alone the rest work in 30 days. In how many days, t...
Ashish and Anil can do a piece of work in 18 days and 24 days respectively. Ashish completed 25% of the work. Find the time taken by Anil to complete th...
A and B together can complete a piece of work in 55 days while B and C together can complete the same work in 66 days. All of three togeth...
V and N, working individually, can complete a task in (w – 2) days and (w + 4) days, respectively. N initiated the task alone and was later joined by ...
3 women and 1 girl together can complete a work in 25 days. 2 women and 5 girls can together complete half of the same work in 9 days. Find the time ta...
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