Number System
If the letters of the word PREVIOUS be arranged at random, what is the probability that all the vowels come together ?

1/16
1/12
1/10
1/14

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Number System
In how many different ways can 7 boys and 3 girls sit in a row such that all the three girls do not sit together ?

3086880
3286880
3386880
3186880

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Number System
The peresent age of the father and the son are in the ratio of 8:3. After 12 years the ratio of their ages will be 2:1. What is the sum of the present age of the father and the son ?

66 years
69 years
68 years
67 years

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