3 years ago

Find the value of x. Will mark brainliest.

Mathematics

1 answer:

Margaret [11]3 years ago

5 0

Answer:

x = 8

Step-by-step explanation:

You might be interested in

Sharla is moving to New York,she found a movin company that charges a one time fee of $400 and $5 per mile,m.which of the follow

ryzh [129]

5+c=400
- 005
395

C=395

4 0

3 years ago

Of the students at Milton middle school 171 are girls if 45% of the students are girls how many total students are there at milt

Volgvan

Answer:

380

Step-by-step explanation:

171:45=3,8

3,8*100=380

8 0

3 years ago

In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select 3 vials from the shipment, in how many wa

Elden [556K]

Answer: 27434

Step-by-step explanation:

Given : Total number of vials = 56

Number of vials that do not have hairline cracks = 13

Then, Number of vials that have hairline cracks =56-13=43

Since , order of selection is not mattering here , so we combinations to find the number of ways.

The number of combinations of m thing r things at a time is given by :-

$^nC_r=\dfrac{n!}{r!(n-r)!}$

Now, the number of ways to select at least one out of 3 vials have a hairline crack will be :-

$^{13}C_2\cdot ^{43}C_{1}+^{13}C_{1}\cdot ^{43}C_{2}+^{13}C_0\cdot ^{43}C_{3}\\\\=\dfrac{13!}{2!(13-2)!}\cdot\dfrac{43!}{1!(42)!}+\dfrac{13!}{1!(12)!}\cdot\dfrac{43!}{2!(41)!}+\dfrac{13!}{0!(13)!}\cdot\dfrac{43!}{3!(40)!}\\\\=\dfrac{13\times12\times11!}{2\times11!}\cdot (43)+(13)\cdot\dfrac{43\times42\times41!}{2\times41!}+(1)\dfrac{43\times42\times41\times40!}{6\times40!}\\\\=3354+11739+12341=27434$