Question

10 defective rings are accidentally mixed with 100 good ones in a lot. It is not possible to just look at a ring and tell whether or not it is defective. One ring is drawn at random from this lot. What is the probability of the ring to be a good one? ​

Answer 1

Answer:

Hence, the probability of the ring to be a good one 10 in 11 times.

Step-by-step explanation:

No. of Defective Rings= 10

No. of Good Rings= 100

∴ Total No. of Rings= 100+10

                             = 110

Now, Probability of an Event happening= No. of Probable Outcomes /            

                                                                Total no. of outcomes

∴ P(ring to be a good one) = $\frac{100}{110}$ = $\frac{10}{11}$

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