# Posts by ammu

Total # Posts: 13

**maths**

average of three number is 12 if two number are 8 and 15 then the third number is ?

**Probability**

The probability that a student passes a physics test is 2/3 and the probability that he passed both physics test and an english test is 14/15. The probability. The probability that he passes at least one test is 4/5. What is the probability that he passes the english test.

**maths**

Three taps A, B ,& C can fill a tank in 12, 15, & 20 hours respectively. If A is open all the tank and B & C are open for one hour each alternatively,the tank will be full in:

**english**

Choose the word which is different from the rest. A. Assassinate B. Kill C. Kidnap D. Stab

**maths**

Three taps A, B ,& C can fill a tank in 12, 15, & 20 hours respectively. If A is open all the tank and B & C are open for one hour each alternatively,the tank will be full in:

**maths**

Three pipes can fill a water tank constantly.The time taken for the first two pipes working simultaneously to fill the tank is equivalent to time taken by the third pipe to fill it alone.If the second pipe fills the tank in 10 hours faster than the first pipe and 8 hours ...

**maths**

.A leak in the bottom of a tank can empty the full tank in 4hours.An inlet pipe fills water at the rate of 5lit a minute.When the tank is full, the inlet is opened and due to the leak,the tank is empty in 6 hours. How many litres does the tank hold?

**maths**

Two pipes A and B can fill in 40 minutes and 30 minutes respectively.Both the pipes are open together but after 5 minutes, pipe B is turned off.What is the total time required to fill the tank?

**physics**

Two bodies have masses in ratio 3:4when a force is applied on the first body it moves with an acceleration of 6m/s2 how much acceleration will the same force produced in the body

**Chemistry**

How would you make 100 mL of a carbonic acid buffer at 0.2 M and pH = 9.8 using 0.5 M HCO3 and either 0.1 M NaOH or 0.1 M HCl and water?

**Science**

The gradient or slope of the distance time graphy at any pont gives

**maths**

the sides of a triangle are in the ratio 21:13:14 if the perimeter is 52cm, the length of smallest side will be?

**economics**

Assuming the inverse demand function for good Z can be written as P = 90 - 3Q, when Q is equal to 5, average revenue and marginal revenue are equal to ________ and ________. Choose one answer. a. $75; $75. b. $75; $60. c. $60; $60. d. $85; $85.