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Grade: 8,    Subject: Math,    Topic: Probability and Statistics Combination and Permutations
Question 1:
Select the correct statement about combination.

You can make multiple combinations of larger number (i.e. 5) of balls from a group of smaller number (i.e. 3) of balls.You can make multiple combinations of smaller number (i.e. 3) of balls from a group of larger number (i.e. 5) of balls.

You can make 2 combinations using one ball.You can make only one combination using two ball.
 
Question 2:
Which of the following is not a common notation used to represent combination?

C(n,r)nCr

nrCnCr
 
Question 3:
Which of the following expression is used to calculate combination with no repetition?


 
Question 4:
How is permutation different from combination?

If order of selected objects in a combination matters then it is a permutation.If order of selected objects in a combination does not matters then it is a permutation.

Order of selected objects in a combination is reverse of the order of selected objects is a permutation.Permutation is a superset of combination.
 
Question 5:
Which of the following is not a common notation used to represent permutation?

P(n,r)nPr

nPrnrP
 
Question 6:
Which of the following expression is used to calculate permutation with no repetition?


 
Question 7:
There are three balls; red, green and yellow. Which of the following represents all possible combinations of two balls?

red, green
green, yellow
red, green
red, yellow
green, yellow

red, green
green, red
red, yellow
yellow, red
green, yellow
yellow, green
red, green
green, red
red, yellow
yellow, red
 
Question 8:
There are three balls; red, green and yellow. Which of the following represents all possible pernumations of two balls?

red, green
green, yellow
red, green
red, yellow
green, yellow

red, green
green, red
red, yellow
yellow, red
green, yellow
yellow, green
red, green
green, red
red, yellow
yellow, red
 
Question 9:
There are four balls; red, green, blue and yellow. If two balls are picked, what is the possible number of combinations?

126

824
 
Question 10:
There are four balls; red, green, blue and yellow. If two balls are picked, what is the possible number of permutations?

126

824
 
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