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svlad2 [7]
3 years ago
12

Which is cheaper for a $65 item that costs $7.24 to ship? A 10% coupon off the cost of the item or free shipping (10 points)

Mathematics
2 answers:
Komok [63]3 years ago
7 0
If we are finding 10% the cost of the item
you would set a proportion
or an easier way would be 
.10x65
6.5
then you subtract that from 65
65-6.5
58.50 is the cost of the item 10% off but with shipping, it would be
58.50+7.25
65.75 is when there is 10% of the item
but it is $65 only if the shipping is free
and since 65<65.75
It is cheaper when the shipping is free

Fittoniya [83]3 years ago
6 0

Answer: Yes, 10% coupon.

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A sample of 4 different calculators is randomly selected from a group containing 18 that are defective and 35 that have no defec
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<span>1.

P(</span>at least one of the calculators is defective)= 

1- P(none of the selected calculators is defective).

2.

P(none of the selected calculators is defective)

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3.

selecting 4 non-defective calculators can be done in C(35, 4) many ways, 

where  C(35, 4)= \frac{35!}{4!31!}= \frac{35*34*33*32*31!}{4!*31!}=  \frac{35*34*33*32}{4!}=  \frac{35*34*33*32}{4*3*2*1}=  52,360

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5. P(at least one of the calculators is defective)= 

1- P(none of the selected calculators is defective)=1-0.18=0.82



Answer:0.82
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