Engineering system of type k-out-of-n is operational if at least k out of n components are operational. Otherwise, the system fails. Suppose that a k-out-of-n system consists of n identical and independent elements for which the lifetime has Weibull distribution with parameters r and λ. More precisely, if T is a lifetime of a component, P(T ≥ t) = e−λtr, t ≥ 0. Time t is in units of months, and consequently, rate parameter λ is in units (month)−1. Parameter r is dimensionless.
Assume that n = 8,k = 4, r = 3/2 and λ = 1/10.
(a) Find the probability that a k-out-of-n system is still operational when checked at time t = 3.
(b) At the check up at time t = 3 the system was found operational. What is the probability that at that time exactly 5 components were operational?

entering that problem on the tube might get you an answer

i think the answer is fried chicken ; >

step-by-step explanation:

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.