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8 years, 10 months ago
7 different balls in 7 diff boxes (each with max 2 balls). No. of ways is a. 7 similar boxes with 7 diff balls (each with max 1 ball). No. of ways is b. What is a/b?
if x+y+z=6 , and x>0 , y>0 , z>0 then find the maximum value of x*y^3*z^2
In the chess world championship, 15 matches take place between the top two ranked players in the world. How many ways can a person predict exactly 12 results (win, draw and loss) right?
How many different scalene triangles are possible with a perimeter of 99 units given that the lengths of all the sides are integers? A 175 B 168 C 192 D 196
India has/have won the toss.
A boy and his dog are climbing a mountain. When the boy is 100m from the summit, his dog starts to run to the summit of the mountain. When it reaches the summit, it runs down the slope again. When the dog reaches the boy this time, he starts to run to the summit the second time, and this process continues until both have reached the top of the mountain. What is the length of the journey his dog has run?
If f(x)=16^x/ 16^x+4, find the value of f(1/852)+f(2/852)+f(3/852)+ ……..+f(851/852).
Facing some problems while practising quants problems from CAT quotient. Strange symbols are being displayed instead of inequality symbols, modulus operators etc, Hope Cracku gets rid of this bug soon.
How many different signals can be made by hoisting 5 different colored flags one above the other,when any number of them may be hoisted a time?(a) 2^5 (b)5P5 (c)325 (d) None
Every day Sunita starts from her home in her car, picks up her son from the bus stop and travels back home. One day her son reached the bus stop 1 hour early and he started walking towards home. Sunita started from her home at the usual time and picked up her son midway and returned home 20 minutes earlier as compared to the usual time. Find the ratio of the speed of Sunita’s car to the speed of her son.
The above question is from CC50. My doubt is, it is mentioned that the son reached bus stop 1 hour early, Let's say generally his mom take him up from bus stop at 12 pm. But that day he reached at 1 hour before and started walking towards home, i.e. the son reached stop at 11 am. Now before his mom starts at 12pm, he must walked for 60 mins, then how come the son walked only for 50 mins as given in the solution?
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