Permutations And Combinations — Mathematics

Test your limits with our Elite Pro-Vault Questions for mathematics

Question 1
EasyJEE

The number of words formed by the letters of the word EQUATION taking all at a time is:

A. 40320
B. 5040
C. 720
D. 8
Question 2
MediumJEE

The number of ways to select 2 red and 3 green balls from 5 red and 4 green balls is:

A. 40
B. 60
C. 30
D. 20
Question 3
EasyJEE

Thenumberof3−digitnumberswithdistinctdigitsfrom1to9is:The number of 3-digit numbers with distinct digits from 1 to 9 is:

A. 504
B. 729
C. 648
D. 720

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