3 years ago

Help me please and thank you

Mathematics

2 answers:

Marta_Voda [28]3 years ago

8 0

Answer:

Step-by-step explanation:

It would be D because you must have 4x (To find the individual water bottle price) plus $3.39 (The price of the popcorn) and have it equal $7.43 (The total cost)

In equation form, this would be 4x+3.39=7.43

givi [52]3 years ago

5 0

Answer: It is D

Step-by-step explanation:

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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:

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