VOLUNTEER TRAINING FOR DISADVANTAGED IN MATHS – QUESTION 15 : A motel cleaner has 8 master keys at home to open all the rooms in a large motel. Each room can be opened by just 1 of these keys. If 40 % of the rooms are left unlocked, what is the probability that the cleaner can get into a specific room if he selects 3 keys at random before leaving home to go to work? (A) 5 / 8, (B) 5 / 16, (C) 31 / 40, (D) 3 / 20, (E) 19 / 40.
- 1 Answers
- 1146 Views
- I also Faced
- E-Mail Answers
Answer Posted / kangchuentat
VOLUNTEER TRAINING FOR DISADVANTAGED IN MATHS – ANSWER 15 : A. Probability = 4 / 10 + (6 / 10) (3 / 8) = 5 / 8
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Compare the Behaviourist & Constructivist approach.
Discuss the inter & intra disciplinary nature of Mathematics.
State and prove sufficient condition for differentiability of the function f(x,y).
The pipes can fill a cistern in 1.5 hours and 2 hours respectively. A wste pipe can empty a full cistern in 3 hours. If the cisternis empty and all three pipes are opened together, in how many min will the cistern be half full
A farmer wishes to make a straight barbed wire fence 80 feet long. He wants to have a fence post every 8 feet. How many fence posts does he need?
If you start with 1 bacterium and double the number every 15 minutes, how many bacteria will you have at the end of 3 hours and 45 minutes?
Name the mathematician who wrote Sidhanta Siromani.
if x,y,z are natural numbers, and if 2x=y and y=3z, which of the following numbers could be x+y+z
I FINISHED MY UG DEGREE COURSE. I AM A MATHEMATICS STUDENT SO PLESE SEND MODEL QUESTION PAPERS FOR ELLEGIBLE OF DEGREE HOLDERS.
If a 16 story building has 12000ft on each floor. Company a rents 7 floors and company b rents 4 floors. What is the number of square feet of unrented floor space?
Define neighbourhood of a point in a plane
Simplify e(3!*5!*6!*3!=3110400)
Write the condition for critical point (a,b) to become a function f(x,y) maximum.
In normal distribution, approximately what percentage of the cases, to the nearest whole number, falls within 4 standard deviations of the mean?
in what time will RS. 3200 amount to RS.3528 at 5% annum compound interest
