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Nostrana [21]
3 years ago
8

Teesha is in the chess club. There are 31 students in the club. Four of them will be picked at random to attend an awards banque

t. What is the probability that Teesha will not be randomly chosen to attend the banquet?
a. 31/27
b. 27/31
c. 31/4
d. 4/31
Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0
Teesha chances are 4/31
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Here the given expression , where: n = Number of key rings in thousands is given as:

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Now, solving the above expression for the value of n, we get:

n^2 -  2 n - 3 = 5\\\implies  n^2  -2n - 8  =  0\\\implies  n^2  -4n +  2n - 8  =  0\\\implies n(n-4)  + 2(n-4)  = 0\\\implies (n-4) (n+2)  = 0

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