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 1140VOLUNTEER 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 8246the 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
634The 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
617the 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
546if the price of orange falls by 20 % one can buy 5 dozens more for RS 300, then the original price per dozen is
543P and Q are positive integers with their averagfe 15, find how many different values can one take
566a spere circumscribes a cylinder . then the ratio of the surface area of the spere to the curved surface area of the cylinder is
615Post New Mathematics Questions
Computer printer produces 176400 lines in a given day. If the printer is in operation for 7 hrs during the day how many lines did it print per minute?
the solution of the system of equations 2y-z=0,x+3y=-4,3x+4y=3 is
What types of tools or measuring devices do you use related to math?
how do we get the volume of sand
ax/b+b=bx/a+a, a//b. then x equals
Explain the aims of teaching mathematics at secondary level.
a spere circumscribes a cylinder . then the ratio of the surface area of the spere to the curved surface area of the cylinder is
What is the value of 2.904+0.0006=___
In statistics, what is the common term for the square root of the variance?
Give the range for the following six values 2, 7, 11, 19, 25, 33
Explain the role of induction, intuition and logical reasoning in Mathematics.
if logs sqrt(5x)=1,then x equals
if n is a natural numbers, the n(n+1)(N+5) is
how to counting numbers of 3 same sides triangles that can be inserted into an a perfect right triangle?
What is -2likelihood function?
