Two factories A and B manufacture watches. Factory A produces on the average one defective item for
every 100 items, whereas B produces only one for every 200. A retailer receives a case of watches from
one of the two above factories, but he does not know from which one. He checks the first watch and it
works. What is the probability that the second watch he will checks is good?
the probiailtty would be at around 15.9% working
Convert the problem to an equation using the percentage formula: P% * X = Y
P is 10%, X is 150, so the equation is 10% * 150 = Y
Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10
Substitute 0.10 for 10% in the equation: 10% * 150 = Y becomes 0.10 * 150 = Y
Do the math: 0.10 * 150 = 15
Y = 15
So 10% of 150 is 15
Double check your answer with the original question: What is 10% of 150? Multiply 0.10 * 150 = 15
Justin is writing his speech for the presentation now. I hope he finishes it before we meet.
2. C. have been playing
The boys' clothes are very dirty. They have been playing soccer.
3. C. Are these
Are these your scissors?
4. B. but
We could have driven to the city, but we took the train instead.
5. A. a
I need a universal charger when I travel.
6. D. None of the above
Greece gets very hot in the summer.
7. B. do
What do the children and their mom do every weekends?
8. D. would
You know, I would like to watch TV. There is a good film on.
9. A. babies
Their babies in the crib are playing.
10. B. thieves
The police arrested five thieves yesterday.
11. B. watched
My husband and I watched a movie last weekend.
12. D. worked
My husband worked the whole night yesterday.
13. A. loves
She loves swimming every summer.
14. D. feels
It feels like summer already.
15. D. have input
They have input the information in the database yesterday.
16. A. given
They have given the gift to the kids.
17. A. passers-by
All the passers-by looked at the bridge before they crossed the street.
18. B. hypotheses
She formulated five hypotheses for her new experiment.
19. C. Mary's & Jane's
The bags are Mary's & Jane's.
20. B. its
The house has its own swimming pool.
2. have been playing
5. none of the above
6. none of the above
19. dad and mom's
2. b. are playing
3. a. Is this
4. b. but
5. c. the
6. d. none of the above
7. a. does
8. b. don't
9. a. babies
10. b. thieves
11. a. watched
12. d. worked
13. a. loves
14. d. feels
15. c. input
16. a. given
17. a. passers-by
18. a. hypothesis
19. b. Mary & Jane's
20. b. its
1. is sleeping.
2.has been raining
5. none of the above
13. has grown
19. Mary's and Jane's
what is your question?