There are 26 - 10 = 16 girls. The number of ways to choose 2 girls from a set of 16 is C(16, 2) = 120. (Your class might be using a different notation for combinations, like $_{16}C_2$ .)

The number of ways to choose 2 people (boys or girls) from a set of 26 is C(26, 2) = 325.

The probability of choosing 2 girls is $\frac{120}{325} = \frac{24}{65}$

Example: how to compute C(16,2):

$C(n, r) = \frac{n!}{r!(n-r)!} \\ C(16, 2) = \frac{16!}{2!(16-2)!} \\ =\frac{16!}{2! \times 14!} \\ =\frac{16\times 15}{2\times 1} \\ =120$

7 0

3 years ago

Please help me i beg of u PLZZZ DUE TODAYYYYYY

IceJOKER [234]

Answer:

Step-by-step explanation:

a. L' (-5,-3) K' (-2,-5) M' (-8,-5)

N' (-5,-7)

b. 3rd

c. I am not sure, it is a reflection of each other so it is just a refelction across the Y

3 0

3 years ago

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