Question

21. It is known that a box of 200 wristwatches contains 20 defective wrist watches. One
wrist watch is taken out at random from the box. Find the probability of getting a non defective wrist watch​

Answer 1

Answer:

1 of 20

PLEASE MARK AS BRAINLIEST

Answer 2

Answer:

9/10

Step-by-step explanation:

Total wristwatches = 200

Defective wrist watches = 20

Non-defective wristwatches =  200 - 20 = 180

Probability = Required outcome (s)/ Total outcomes

                     = 180/ 200 = 9/10 or 0.9