Use the permutation formula
nPr = (n!)/((n-r)!)
20P15 = (20!)/((20-15)!)
20P15 = (20!)/(5!)
The final answer is choice A
Answer:B
Step-by-step explanation:
Salutations!
<span>The ratio of boys to girls in a school is 5:4. if there are 180 students, how many girls are there?
Let the number of girls and boys be 'x'.
</span>

<span>
Add 5 and 4
</span>

<span>
</span>

<span>
Now, multiply the ratios by 20.
Boys =
20 </span>× 5 = 100
Girls = 20 × 4 = 80.
There were 80 girls.
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Have a great day!
longer congruent sides = 6-0 OR 4-(-2) = 6units
perimeter= 3.6×2 + 6×2 = 19.2units
height of parallelogram= 2-(-1) = 3 units
area= 3×6 = 18unit^2
The value of angle x which is substended in the circle will be D. 342.6°.
<h3>How to calculate the circle?</h3>
From the information given, it has been depicted that the value of the angle that's facing x is 17.4°.
Therefore, the value of x which is inscribed in the circle will be:
= 360° - 17.4°
= 342.6°
In conclusion, the correct option is 342.6°.
Learn more about circle on:
brainly.com/question/22965557