Show that the height of a closed right circular cylinder of given surface and maximum volume, is equal to the diameter of its base.
How many times must a man toss a fair coin, so that the probability of having at least one head is more than 80%?
Let the man toss the coin n times. then n tosses are n Bernoulli trials
Probability ( P ) of getting a head at the toss of a coin is
It is given that
P ( getting at least one head )
The minimum value of n which satisfies given inequality is 3.
Thus, the man should toss the coin 3 or more than 3 times.
A manufacturer produces nuts and bolts. It takes 1 hours of work on machine A and 3 hours on machine B to product a package of nuts. It takes 3 hours on machine A and 1 hour on machine B to produce a package of bolts. He earns a profit of `17.50 per package on nuts and `7 per package of bolts. How many packages of each should be produced each day so as to maximize his profits if he operates his machines for at the most 12 hours a day? From the above as a linear programming problem and solve it graphically.