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6 . A box contains 2 white balls and 4 red ball. in how many ways can 3 balls be drawn from the box , if at least one black ball is to be included i the draw ?
A. 32 B. 48
C. 64 D. 96

7 . How many 3 – digit number can be formed from the digit 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?
A. 5 B. 10
C. 15 D. 20

8 . Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed?
A. 210 B. 1050
C. 25200 D. 21400

9 . How many words can be formed by using all letters of the word ‘BIHAR’ ?
A. 110 B. 120
C. 130 D. 140

10 . How many 6 digit number can be formed from the digits 1, 2, 3, 4, 5, 6 which are divisible by 4 and digits are not repeated?
A. 192 B. 122
C. 140 D. 242




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