If the letters of the word HORIZON be arranged at random, what is the probability that vowels are not together?
Let E= event of getting all vowels are not together= (1- all vowels are together) ∴ P (E) = 1-1/7 = 6/7
96 111 131 ? 186 221
-3 -10 -40 -185 -905 -4500
-4 a b c d e
Find the value of d.
10 19 58 ...
108 329 ? 2975 8928 26789 .
2556 636 156 ? 6
12, 18, 28, 42, 52, ?
11, 9, 15, 41 ,157, 789
8 9 22 75 316 ?
16 17 25 ? 99 180
5, 11, 32, 65, ?, 389
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