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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 1827VOLUNTEER 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 8993the perimetere of a square is 44m more than that of another and 187 sqm more in area then the side of the larger square is
1056The 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
1359the ages of two brothers are now in the ratio 4:3 but fifteen years ago, they were in the ratio 3:2the present age are
951if the price of orange falls by 20 % one can buy 5 dozens more for RS 300, then the original price per dozen is
1227P and Q are positive integers with their averagfe 15, find how many different values can one take
1033a spere circumscribes a cylinder . then the ratio of the surface area of the spere to the curved surface area of the cylinder is
1137Post New Mathematics Questions
In certain company 20% of the men and 40% of the women attended the annual company picnic. If 35% of all the employees are men .what % of all the employee went to the picnic?
The converse of this theorem is: if the sum of the squares of two sides of a triangle equal the square of the third side then the triangle is a right triangle. What is thename of the theorem?
Have you learned any new math tactics or shortcuts with your job?
what is the radius of the circle 4x**2+4y**2 =100
The probability of getting at least one head in a single throw of three coins is
If in a sequence of natural numbers, starting with 2, you begin eliminating every second number after 2, then every third number after 3, then every fourth numberafter 4, and so on, what type of numbers will be left?
how to counting numbers of 3 same sides triangles that can be inserted into an a perfect right triangle?
What 3 consecutive numbers add up to 45?
find 200/7*5.04=
the least integer n for which the sum 1+3+5+---+(2n+1) exceeds 9999 is
Who is the chief exponent of social constructivism?
briefly know about ur native place?
if n is a natural numbers, the n(n+1)(N+5) is
Converse of this theorem is: if the sum of the squares of two sides of a triangle equal the square of the third side then the triangle is a right triangle. What is the name of the theorem?
Every even integer greater than 2 can be written as the sum of two primes. Give the respective two pairs of prime numbers that when added give 8 and 12.
