Please solve 17 ques of probability
I am unable to understand 2 part
17 ques is starting from A lot of..... defective? This one is 17 ques
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(i)Total number of possible outcomes = 20
Number of favourable outcomes = 4
Hence, P (getting a defective bulb) = 4/20 = 1/5
(ii) Total number of possible outcomes = 20-1 = 19
Favourable outcomes = 19- 4= 15
P (not getting a defective bulb) = 15/19
Hope it helps!
Number of favourable outcomes = 4
Hence, P (getting a defective bulb) = 4/20 = 1/5
(ii) Total number of possible outcomes = 20-1 = 19
Favourable outcomes = 19- 4= 15
P (not getting a defective bulb) = 15/19
Hope it helps!
pranjal7:
Now also I have not understood 2 part
How 19 possible outcomes
Means why 19 possible outcomes
see in 1st part one bulb was picked...suppose tht it was not defective and it was not replaced ...means usse hamne vapis nahi rakha ..th the total no. of oucomes = 20 - that non defective bulb =19
hope u understand now
Yes
also the bulb was from the non defective category so 1 bulb will be subtracted from initial no. of non defective bulbs
Understood??
Yes
Thanks
Answered by
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(i)Total number of possible outcomes = 20
Number of favourable outcomes = 4
Hence, P (getting a defective bulb) = 4/20 = 1/5
(ii) Total number of possible outcomes = 20-1 = 19
Favourable outcomes = 19- 4= 15
P (not getting a defective bulb) = 15/19
Number of favourable outcomes = 4
Hence, P (getting a defective bulb) = 4/20 = 1/5
(ii) Total number of possible outcomes = 20-1 = 19
Favourable outcomes = 19- 4= 15
P (not getting a defective bulb) = 15/19
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