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  

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Explain about Mathematical language & symbolism.

0 Answers   Mahatma Gandhi University,

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the cordinates of A,b,c are respectively (2,3) ,(4,4) AND (0,-2). If abcd is a parallelgram. The coordinates of D are

0 Answers   DSQ Software,

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find 15% of 86.04=

0 Answers   Wipro,

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Is nine in number system equivalent to zero?

1 Answers   GTM, MPSC, Political Science, Wipro,

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Under what condition the critical point (a,b) will be saddle point ?

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What types of tools or measuring devices do you use related to math?

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If total students is 80th and english fail 48th, bengali fail 48th

1 Answers  

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find What is the value of 625% of 7.71=

0 Answers   Wipro,

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state clearly the domain and range of random variable?

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a spere circumscribes a cylinder . then the ratio of the surface area of the spere to the curved surface area of the cylinder is

0 Answers   DSQ Software,

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VOLUNTEER TRAINING FOR DISADVANTAGED IN MATHS – QUESTION 16 : A committee of 6 people is to be chosen from 8 students and 6 teachers so that it contains at least 3 students and at least 2 teachers. The number of ways this can be done is – (A) 1050, (B) 1120, (C) 7560, (D) 840, (E) 2170.

1 Answers  

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