A frequency distribution of the life times of 400 T.V. Picture tubes tested in tube company is given below. Find the average life of tube ?

The following table gives the distribution of the life time of 400 neon lamps : Find the median life time of a lamp.

In deriving Bernoulli's equation, we equated the work done on the fluid in the tube to its change in the potential and kinetic energy . What is the largest average velocity of blood How in an artery of diameter 2xx 10^-3 m if the flow must remain laminar ? Discuss qualitatively.

Saloni took a piece of burning charcoal and collected the gas evolved in test tube How will she find the nature of gas ?.

The following table gives life time of 400 neon lamps: A bulb is selected at random. Find the probability of that the life time of the selected bulb is atleast 800 hours.

The following table gives life time of 400 neon lamps: A bulb is selected at random. Find the probability of that the life time of the selected bulb is between 400 to 900 hours.

The following table gives the life times of 400 neon lamps : : Represent the given information with the help of a histogram.

The following table gives life time of 400 neon lamps: A bulb is selected at random. Find the probability of that the life time of the selected bulb is less than 500 hours.