Of three taps X, Y and Z, Y takes 2 times as much time as X and Z together, while X takes 20 minutes more than Y and Z together to fill a tank. If the three taps together fill the tank in 24 minutes, then how long does X take to fill the tank individually?
In How Many ways 7 persons can be selected from among 5 indian,4 british & 2 chinise,if atleast two are to be selected from each country.
Please elaborate with steps.In my booklet ans given is 100
Karim , a tourist leaves Ellora on a bicycle. having travellied for 1.5 hr at 16 km/hr, he makes a stop for 1.5 hr and pedals on with the same speed.Four hours after karim started , his friend and local guide rahim leave ellora on motocycle and rides with a speed of 28 km/hr in the same direction as Karim had gone. what distance will they cover before rahim overtake Karim?
find the number of integer coordinates
a) within the boundary of |x| + |y|=4
b) within or on the boundary of |x| + |y|=4
c) in the first quadarnt and within the boundary of |x| + |y|=4
Best software to plot graphs online ?
What is the maximum value of (a + 1)(b + 3)(c + 1) if a + b + c = 12?
(1-3x+2x)^55, find some of all coefficient of x?
investment ratio of three investors are z^2:y^2:x^2 their amount are in ratio x:y:z, find ratio of investment time for three? given y-x=y-z=k,y>3k.
A cask contains 12 ltrs of mixture of wine and water in the ratio 3:1. How much of the mixture must be drawn off and water substituted so that wine and water in the cask may become half and half.
In DI ? how to solve this faster ?
175000/2835 ?
The infinite sum 1 + 3/4 + 5/16 + 7/64 + ... equals :
- a) 5/3
- b) 2
- c) 20/9
- d) 26/9
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Three six faces fair dice are thrown together. What is the probability that the sum of the numbers on the faces is 12?
A coin is tossed 5 times. The probability that the same face does not appear in any 4 consecutive trials is?
If An = 3An-1 + 5 , (n-1 -> subscript of A), N being any natural number greater than 1 and A1 = 1, find A50?
a) [6 * 2^49 - 5]/2
b) [7 * 3^49 - 5]/2
c) [7 * 3^49 - 3]/2
d) [6 * 2^49 - 7]/2
A person wrote first N consecutive natural nos. and found their sum. Another person came and deleted smallest number and found the sum of the remaining nos. The process continued until N remained on the board. The average of all the sums is found out to be 105. Find N?
a) 17 b) 20 c) 19 d) 23
45 men can complete a work in 16 days. Six days after they started working, 30 more men joined them. How many days they now take to complete the remaining work?
Please post the procedure as well. Thanks!
3 dies are thrown together. What is the probability that their sum is even given that 5 appears on the first die?
The sum of 1st 11 terms of an AP is equal to the sum of 1st 19 terms of that AP. Then what is the sum of 1st 30 terms of that AP?
- a) 1
- c) 30
- b) 0
- d) none of these
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From the numbers 0000 to 9999, what is the pblty that a random number picked is such that the sum of the first two digits equals the sum of the last two digits.?
Options: 1) 57/1000 2) 67/1000 3) 77/1000 4) 69/1000
A and B are working on an assignment. A takes 6 hours to type 32 pages on a computer, while B takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
Please post the procedure as well. Thanks!