A factory manufacturing car batteries made a survey in the field on th

1.	A factory manufacturing car batteries made a survey in the field on the life of these batteries. The data obtained was as follows: LifeTime (inmonths)Less than2424−3636−48morethan48TotalBatteriesNumber ofbatteries502405501601000 What is the probability that a battery chosen at random (i) will not last more than 36 months? (ii) will last for four years? [2 MARKS]
Answer» A factory manufacturing car batteries made a survey in the field on the life of these batteries. The data obtained was as follows: $\begin{matrix} L i f e T i m e (i n m o n t h s) & L e s s t h a n 24 & 24 - 36 & 36 - 48 & m o r e t h a n 48 & T o t a l B a t t e r i e s N u m b e r o f b a t t e r i e s & 50 & 240 & 550 & 160 & 1000 \end{matrix}$ What is the probability that a battery chosen at random (i) will not last more than 36 months? (ii) will last for four years? [2 MARKS]

A factory manufacturing car batteries made a survey in the field on the life of these batteries. The data obtained was as follows: LifeTime (inmonths)Less than2424−3636−48morethan48TotalBatteriesNumber ofbatteries502405501601000 What is the probability that a battery chosen at random (i) will not last more than 36 months? (ii) will last for four years? [2 MARKS]

Answer»

A factory manufacturing car batteries made a survey in the field on the life of these batteries. The data obtained was as follows:

$\begin{matrix} L i f e T i m e (i n m o n t h s) & L e s s t h a n 24 & 24 - 36 & 36 - 48 & m o r e t h a n 48 & T o t a l B a t t e r i e s N u m b e r o f b a t t e r i e s & 50 & 240 & 550 & 160 & 1000 \end{matrix}$

What is the probability that a battery chosen at random

(i) will not last more than 36 months?

(ii) will last for four years? [2 MARKS]

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