only SOLVE THE required $17$:

A company called Fruit designs smartphones called e$-$Phones. The items are produced on three

factories. The three factories account for $20\%,30\%,$ and $50\%$ of the output, respectively. The

fraction of defective e$-$Phones produced is this: for the first factory, $5\%$; for the second factory,

$3\%$; for the third factory, $1\%.$

what is the probability of producing a defective phone $?$

$)0\mathrm{.}86$

b$)0\mathrm{.}24$

c$)0\mathrm{.}024$

d$)0\mathrm{.}986$

what is the probability of the first factory producing a good phone $?$

a$)0\mathrm{.}91$

b$)0\mathrm{.}991$

c$)0\mathrm{.}019$

d$)0\mathrm{.}19$

If an e$-$Phone is chosen at random from the total output and is found to be defective, what is the

probability that it was produced by the third factory?

$)0\mathrm{.}8$

b$)0\mathrm{.}208$

c$)0\mathrm{.}028$

d$)0\mathrm{.}82$S

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