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sattari [20]
3 years ago
10

A plastic bin contains red, yellow, and green key chains. Out of 350 key chains, 10% percent are yellow. Of the remaining key ch

ains, 3/5 are green. How many red key chains are inside the bin?
Mathematics
2 answers:
asambeis [7]3 years ago
7 0

The answer is 126 welcome


vagabundo [1.1K]3 years ago
6 0
Red+green+yellow=350

10% out of 350 are yellow
0.1 times 350=35

350-35=315

3/5 out of 315 are green
red is not green so
2/5 of what is left is red
2/5 of 315 is red
2/5 times 315=430/5=126

126 red
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Rachel works a day job and an evening job. She works 77 hours every two weeks. The ratio of the hours she works at her day job t
Nadusha1986 [10]

Answer:

1680 dollars

Step-by-step explanation:

7 + 4 = 11

77  \div 11 = 7

day \: 7 \times 7 = 49h

evening \: 7 \times 4 = 28h

24 \div 4 = 6

6 \times 3 = 18 (hourly \:  pay \: of \: evening \: job)

24 \times 49 = 1176

28 \times 18 = 504

total \: 1176 + 504 = 1680

4 0
4 years ago
Two types of defects are observed in the production of integrated circuit boards. It is estimated that 6% of the boards have sol
aalyn [17]

Answer:

(a) 0.09

(b) 0.06

(c) 0.0018

(d) 0.9118

(e) 0.03

Step-by-step explanation:

Let <em>A</em> = boards have solder defects and <em>B</em> = boards have surface defects.

The proportion of boards having solder defects is, P (A) = 0.06.

The proportion of boards having surface-finish defects is, P (B) = 0.03.

It is provided that the events A and B are independent, i.e.

P(A\cap B)=P(A)\times P(B)

(a)

Compute the probability that either a solder defect or a surface-finish defect or both are found as follows:

= P (A or B) + P (A and B)

=P(A)+P(B)-P(A\cap B)+P(A\cap B)\\=P(A)+P(B)\\=0.06+0.03\\=0.09

Thus, the probability that either a solder defect or a surface-finish defect or both are found is 0.09.

(b)

The probability that a solder defect is found is 0.06.

(c)

The probability that both defect are found is:

P(A\cap B)=P(A)\times P(B)\\=0.06\times0.03\\=0.0018

Thus, the probability that both defect are found is 0.0018.

(d)

The probability that none of the defect is found is:

P(A^{c}\cup B^{c})=1-P(A\cup B)\\=1-P(A)-P(B)+P(A\cap B)\\=1-P(A)-P(B)+[P(A)\times P(B)]\\=1-0.06-0.03+(0.06\times0.03)\\=0.9118

Thus, the probability that none of the defect is found is 0.9118.

(e)

The probability that the defect found is a surface finish is 0.03.

6 0
4 years ago
My state's lottery has 30 white balls numbered from 1 through 30 and 20 red balls numbered from 1 through 20. In each lottery dr
seropon [69]

The three whites:

(30 choose 1) * (29 choose 1) * (28 choose 1) = 30 * 29 * 28


The two reds:

(20 choose 1) * (19 choose 1) = 20 * 19


So, The three whites + two reds = 30 * 29 * 28 + 20 * 19 = 24740

7 0
3 years ago
14x + 54 = 11x + 96 x=
jenyasd209 [6]
Move the 11x to the left and the +54 to the right. Their signs will flip:

14x-11x = 96-54
3x = 42
x = 14
4 0
4 years ago
Read 2 more answers
How i can answer this question, NO LINKS, if you answer correctly i will give u brainliest!
Natalka [10]

Answer:

Step-by-step explanation:

x^2.x^1

=9^2.9^1

= 9 multiplied by 9

=81

9 multiplied by 1

=9

81 multiplied by nine

=585.198599

6 0
2 years ago
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