Question

Gopi buys a top for his son, if it is non-defective. Shopkeeper takes out one toy at random from a box of $10$ toys containing $3$ defective toys and other good ones. Find the probability that (1) Gopi buys the toy. (2) Gopi does not buy the toy.

Answer 1

Total No. of Toys $-10$

Defective Toys $=3$

Non defective toys $=7$

(i) Probability that Gopi buys toys $\Rightarrow \frac{No.ofNon-defectivetoys}{TotalNo.oftoys}=\frac{7}{10}=0.7$

(ii) Probability that Gopi doesn't buy toys

$\Rightarrow \frac{No.ofNon-defectivetoys}{TotalNo.oftoys}=\frac{7}{10}=0.7$

Probability $\Rightarrow$ It is the ratio of Number of favourable events to the total number of all possible events

$P\left(x\right)=\frac{No.offavourableevents}{Totalevents}$