Question
What is the probability that four A’s come
consecutively in the word ‘AMALGAMATION’Solution
Total number of words that can be formed from the letters of the word AMALGAMATION= 12!/(4! × 2!) When all the A’s are together then the number of words can be formed = 9!/2! Required Probability = 9!/2!/ 12!/(4!× 2!) =1/55
- A man alone can do a work in 25 days. A woman can complete half of the same work in 20 days. In how many days can they complete 90% of the work together?
Ravi, Sohan, and Mohan can complete a certain task individually in 18 days, 24 days, and 30 days, respectively. They all started working together, but a...
P can do a piece of work in 25 days, Q can complete double the work in 40 days and R can do the work in 30 days. If all of them together earn Rs. 7400, ...
Sachin can complete a job in 15 days. Ankit alone can complete the same job in 10 days. Sachin works for 9 days and then the remaining job is completed ...
A can complete a piece of work in 12 days and B can complete it in 18 days. They work together for 4 days and then B leaves. In how many more days will ...
βAβ and βBβ can do a piece of work in 10 days and 15 days, respectively. They started working together but βAβ left after 3 days. Find the t...
Q can do a work in 15 days and R can do the two-third work done by P and Q together in a day. If R completes the work in 18 days, how many days will it ...
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...
P alone can finish a piece of work βMβ in 6 days while Q takes 3 days to finish it alone. P, Q and R working together can finish the work βNβ wh...
Worker A can build a wall alone in 30 days. When A and B work together, they can complete the wall in 16 days. If B starts building the wall alone and w...