## Permutation & Combination

## SAT problem : Question of the day !!!

20 points of which 7 are collinear. How many triangles & quadrilaterals can be drawn? A. 55,2355 B. 79,4355 C. 54,4533 D. 45,2644 E. 50,6654

## SAT Problem : Question of the day !!

In how may ways can you arrange 4 alphabets (w,x, y, z) in a straight line so that w comes before ‘y ? A. 15 B. 14 C. 24 D.12 E. 20

## SAT Problem : NUMBER OF POLYGONS?

There are 20 points of which 7 are co-linear. How many triangles & quadrilateral can be formed? A. 22 , 43 B. 78, 4563 C. 79, 4355 D. 40, 4657 E. 80, 354

## SAT Problem : if Best and Worst paintings are together. ?

Arrange 4 different paintings so that the best and worst are together. A. 10 B. 12 C. 15 D. 8 E. 24

## SAT Problem : If repetition is allowed.

How many three digit numbers can be formed using the digits 5,6,7? (1) if repetition is allowed. (2) if repetition is not allowed. A. 9 , 14 B. 20 , 18 C. 27 , 6 D. 26, 22 E. 24 , 24

## SAT Question of the Day: How many handshakes take place?

6 people meet for a business lunch. Each person shakes hands once with each other person present. How many handshakes take place? A. 30 B. 21 C. 18 D. 15 E. 10