Answer:
The correct answer is second option 16C₁₄ = 120
Step-by-step explanation:
Formula:-
nCr = (n!)/r!(n - r)!
To find the value of 16C₁₄
By the formula we can write,
16C₁₄ = 16!/14!(16 - 14)!
= 16!/14!2!
= (16 * 15 * 14!)14!2!
= (16 * 15)/(1 * 2 )
= 8 * 15
= 120
Therefore the correct answer is second option 16C₁₄ = 120
Answer:
120
Step-by-step explanation:
we use the combinations formula
16!/((16-14)!(14!))
Answer:
D. 18 bags
Step-by-step explanation:
Given:
Matilda is filling a circular section of her porch with colorful pebbles.
Diameter of circular section = 15 feet.
Each bag of pebbles covers 10 square feet.
Question asked:
How many bags of pebbles will Matilda need?
Solution:
Diameter of circular section = 15 feet
Radius, r =
10 square feet is covered by number of bag of pebbles = 1
1 square feet is covered by number of bag of pebbles =
176.78 square feet is covered by number of bags of pebbles =
We found up to 17 bags of pebbles there is still some place left to fill the section:-
Thus, Matilda need about 18 bags of pebbles to fill the circular section of her porch.