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ATQ,
Let the speed of train Q = x km/h According to the question, (45 + x) × 5/18 = (120 + 150)/15 (45 + x) × 5/18 = 18 45 + x = 64.8 x = 19.8 km/h
Geography books are never together.
How many different words can be formed with the letters of the word PRACTICE such that each of the word begin with E and ends with R?
In how many ways can 17 members be seated in two lines with seating capacity of 9 and 8 members respectively?
1. 9! ×8!
Out of 6 men and 3 women a committee of 3 members is to be formed so that it has 2 men and 1 woman. In how many different ways can this be done?
In how ways can the selection be made so that a particular member is always included?
...From 6 officers and 8 Jawans, in how many ways can 5 be chosen to include exactly 3 officers?
