Question

a machine needs 2 of its gears replaced . you find 2 gears one manufactured 5 years ago and the other manufactured 10 years ago. the specifications sheet says that the chance of failure is 5 % after 5 years and increases to 8% after 10 years . if the gears on the machine are in no way linked to each other what are the chances that both will fail?

Answer 1

you can multiply the chance of failure

Answer 2

so iit would be 0.4% or
40%

Answer 3

chance of failure for one of the gears is 5% which is the same as 5/100 or 0.05
the other is 8% = 8/100 = 0.08
multiply those

Answer 4

szo iitsz 0.4 thanx ii hope iim riight lol

Answer 5

it depends if you write the answer as a percent or as a decimal.
which way do they want it ?

Answer 6

%

Answer 7

the easiest way to not get confused is change everything to decimals
and mulitply
0.05*0.08= 0.0040
then change back to a percent by multiplying by 100 (and adding a % sign)
100* 0.0040= 0.4
so we get 0.4 % chance that both gears will fail