3 years ago

Please help me!!!!! Pleaseee!

Mathematics

2 answers:

yulyashka [42]3 years ago

6 0

It is between b or c

shutvik [7]3 years ago

5 0

I think it is b go try it

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Four-fifths of a number minus two is greater than three-tenths of twice that number

Bas_tet [7]

If you can write this out, it will read
(4/5)x-2>(3/10) times 2x
Now, lets combine what we can, and then add 2 to both sides,
((4/5)x>(3/5)x+2
Now divide both sides by (4/5), or multiply both sides by (5/4).
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3 years ago

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2 years ago

In a box of 25 external hard disks, there are 2 defectives. An inspector examines 5 of these hard disks. Find the probability th

Salsk061 [2.6K]

Answer:

0.3667 or 36.67%

Step-by-step explanation:

The probability of getting at least 1 defective hard disk among the 5 (P(X>0)) is equal to 100% minus the probability of getting none defectives (1-P(X=0)).

If 23 out of 25 hard disks are non-defective, the probability is:

$P(X>0) = 1 -P(X=0)\\P(X>0) = 1 -\frac{23}{25}*\frac{22}{24} *\frac{21}{23} *\frac{20}{22} *\frac{19}{21}\\ P(X>0) = 0.3667=36.67\%$