If on an average 9 ships out of 10 arriv...

If on an average 9 ships out of 10 arrive safely to ports, find the mean and S.D. of ships returning safely out of a total of 500 ships.

Text Solution

AI Generated Solution

Topper's Solved these Questions

BINARY OPERATIONS
RD SHARMA ENGLISH|Exercise All Questions|226 Videos
CONTINUITY
RD SHARMA ENGLISH|Exercise All Questions|282 Videos

Similar Questions

Explore conceptually related problems

The probability of any ship return safely to the port is 1/5 . Find the probability that the returning out of 5 ships, at least 3 ships returns safely. It is given that returning ships are independently.

Find out the mean of 12,10,20

Meenu bought two fans for Rs 1200 each. She sold one at a loss of 5% and the other at a profit of 10%. Find the selling price of each. Also find out the total profit or loss.

Certain transition of electron from excited state to ground state in one or more steps gives rise to a total of 10 lines find out the number of lines which are present in the visible range

If one out of 10 coming ships is wrecked. Find the probability that out of five coming ships at least 4 reach safely.

If on an average 1 vessel in every 10 is wrecked, the chance that out of 5 vessels expected 4 at least will arrive sefely is

One in 9 ships is likely to be wrecked when they are set on a sail. When 6 ships are on sail, find the probability for i) atleast one will arrive safely ii) exactly three will arrive safely.

A ship A streams due north at 16 km h^-1 and a ship B due west at 12 km h^-1 . At a certain instant B is 10 km north east of A . Find the (a) magnitude of velocity of A relative to B . (b) nearest distance of approach of ships.

One in 9 ships is likely to be wrecked when they are set on sail. When 6 ships are set on sail, the probability for exactly 3 to arrive safely is

Three ships A ,B ,a n dC sail from England to India. If the ratio of their arriving safely are 2:5, 3:7, and 6:11, respectively, then the probability of all the ships for arriving safely is a. 18/595 b. 6/17 c. 3/10 d. 2/7

RD SHARMA ENGLISH-BINOMIAL DISTRIBUTION -All Questions

The mean of a binomial distribution is 20, and the standard deviation ...
Text Solution
|
If the probability of defective bolts is 0.1, find the mean and standa...
Text Solution
|
If on an average 9 ships out of 10 arrive safely to ports, find the me...
Text Solution
|
In eight throws of a die 5 or 6 is considered a success, find the mean...
Text Solution
|
Find the expected number of boys in a family with 8 children, assuming...
Text Solution
|
A die is thrown thrice. A success is 1 or 6 in a throw. Find the mean ...
Text Solution
|
A pair of dice is thrown 4 times. If getting a doublet is considere...
Text Solution
|
From a lot of 15 bulbs which include 5 defectives, a sample of 2 bulbs...
Text Solution
|
Three cards are drawn successively with replacement from a well shu...
Text Solution
|
In a binomial distribution, if n=20 ,\ q=0. 75 ,then write its mean.
Text Solution
|
A binomial distribution has mean 5 and variance 4. Find the number of ...
Text Solution
|
In a group of 200 items, if the probability of getting a defective ite...
Text Solution
|
If the mean of a binomial distribution is 20 and its standard deviatio...
Text Solution
|
The mean of a binomial distribution is 10 and its standard deviation i...
Text Solution
|
The mean and variance of a random variable X having a binomial distrib...
Text Solution
|
If the mean and variance of a binomial variable X are 2 and 1 respecti...
Text Solution
|
If in a binomial distribution n=4 \ and \ P(X = 0) = (16)/(81), find q...
Text Solution
|
Find the binomial distribution for which the mean is 4 and variance 3.
Text Solution
|
If for a binomial distribution P(X=1)=P(X=2)=alpha, \ write \ P(X=4) i...
Text Solution
|
A fair coin is tossed four times. Let X denote the number of heads ...
Text Solution
|