Question

Will give MEDAL AND FAN if you help!!!

Answer 1

answer choices ?

Answer 2

0.2
0.4
0.9
7.5
40

Answer 3

@Smileyside Probability of failure of one gear (manufactured 5 years ago) is 5% or
5/100 or 1/20

Probability of failure of 2nd gear (manufactured 10 years ago) is 8% or
8/100 or 2/25

do you think probability of failure of one gear is related to other?

Answer 4

no

Answer 5

Yes. so probability of both failing is

P(failure of 5 years old gear) x P (failure of 10 years old gear)
Could you find now?

Answer 6

ok thanks

Answer 7

so 50?

Answer 8

for percentage of probability just multiply by 100 .

No problem btw :)

Answer 9

please check your calculation
P (5 years)= 1/20
P (10 years)= 2/25
\[P (both)=\frac{1}{20}\times \frac{2}{25}\]

Answer 10

0.004

Answer 11

Remember that question has asked for percentage of probability, so multiply this by 100 to get the answer

Answer 12

40.4?

Answer 13

\[0.004*1000=\frac{4}{1000}*100\]

Answer 14

0.4

Answer 15

yes, right :)

Answer 16

ok thanks