EASY
11th ICSE
IMPORTANT
Earn 100

A book shelf contains 7 different mathematics books and 5 different physics books. How many groups of 3 mathematics and 3 physics books can be selected?

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Important Questions on Permutations and Combinations

EASY
11th ICSE
IMPORTANT
What is the number of ways of choosing 2 red cards from a pack of 52 cards?
EASY
11th ICSE
IMPORTANT
What is the number of ways of choosing 3 picture cards from a deck of 52 cards?
MEDIUM
11th ICSE
IMPORTANT
What is number of ways of selecting 4 cards from a pack of 52 cards which include exactly one red queen?
EASY
11th ICSE
IMPORTANT
Seven points lie on a circle. How many chords can be drawn by joining these points? 
EASY
11th ICSE
IMPORTANT
How many triangles can be formed by joining the vertices of hexagon? 
MEDIUM
11th ICSE
IMPORTANT

Find the number of rectangles in the adjoining figure.

       
       
       

 

MEDIUM
11th ICSE
IMPORTANT
Find the number of ways of painting a regular tetrahedron with four paints of different colors.
MEDIUM
11th ICSE
IMPORTANT
How many words can be formed by taking four different letters of the word 'MATHEMATICS'?