Question
How many words can be formed from the word INCREASE in
which both E’s do not come together?Solution
Total number of letters in the word INCREASE is 8. ∴ Total number of ways = 8!/2! Number of ways when 2 E’s are together = (7! 2!)/2! = 5040 ∴ Number of ways when 2 E’s are not together = 20160 – 5040 = 15120
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between x and y and choose the...
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13, 55, 111, 183, 273, ?Â
A man can row a boat in still water at a speed of 8 km/h. He rows downstream for 1 hour and then returns upstream. If the total time taken for the entir...
I). 2p 2  – 13p + 21 = 0
II). q 2  – 10q + 24 = 0
The ratio of two numbers 'a' and 'b' is 7:4, respectively. Whereas the ratio of 'b' and 'c' is 5:8, respectively. When 15 is added to 'a', it becomes th...
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Three numbers are in HP. Their sum is 37 and the sum of their reciprocals is 1/4. The numbers are:
(32)Â -3/5Â = ?
A certain sum of money becomes Rs. 1900 in 1 year and 2600 in 3 years at certain rate of simple interest. Find the sum of money invested.
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