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navik [9.2K]
2 years ago
7

There are 9 balls in a hat .The balls are numbered 1-9 you need to choose 3 of the balls . How many possible combinations are th

ere
Mathematics
1 answer:
Virty [35]2 years ago
3 0

Answer:

84

Step-by-step explanation:

Combinations

nCr

n (objects) = 9

r (sample) = 3

9C3

n! / r! (n – r)!

9! / 3! (9 – 3)!=

9! / (3! * 6!)=

9*8*7*6!/ (3! * 6!)=

6! cancels out

9*8*7/3*2*1=

3*4*7=

12*7=

84

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a previous analysis of paper boxes showed that the standard deviation of their lengths is 15 millimeters. A packers wishes to fi
vladimir1956 [14]

Answer:

864.36 boxes

Step-by-step explanation:

In the question above, we are given the following values,

Confidence interval 95%

Since we know the confidence interval, we can find the score.

Z score = 1.96

σ , Standards deviation = 15mm

Margin of error = 1 mm

The formula to use to solve the above question is given as:

No of boxes =[ (z score × standard deviation)/ margin of error]²

No of boxes = [(1.96 × 15)/1]²

= 864.36 boxes

Based on the options above, we can round it up to 97 boxes.

8 0
3 years ago
48 students are going to the zoo. one-fourth brought umbrellas. how many people did not bring umbrellas
Tom [10]
1/4=12
48-12=36
Answer is 36.
6 0
3 years ago
Read 2 more answers
The dimensions of a small post office are 9 feet 11 inches by 8 feet 2 inches. Why would you use the measurement 9 feet 11 inche
andrey2020 [161]

Answer:

bc thast not a number in the quation therfore you wouldnt use it

Step-by-step explanation:

6 0
3 years ago
Need help real quick!!!
ExtremeBDS [4]

Answer:

what help you needed. ??

5 0
2 years ago
What is (f.g)(x)? f(x) = -2x + 3 g(x) = 2x Write your answer as a polynomial or a rational function in simplest form.​
Len [333]

Answer:

-4x +3

Step-by-step explanation:

Given the functions f(x) = -2x + 3 and g(x) = 2x We are to find the composite function (f*g(x))

(f*g(x)) = f(g(x))

f(g(x)) = f(2x)

f(2x) = -2(2x) + 3

f(2x) = -4x +3

Hence f(g(x)) = -4x +3

7 0
3 years ago
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