Frequently Asked Questions
A man is known to speak the truth 3 out of 4 times
He throws a die and reports that it is a six. The probability that it is actually a six is
Let R,S be the event that the man reports that is a six and the throw is a six respectively.
P(R|S)= the probability that the man reports it is a six when it is a six = probability of speak truth =3/4
P(R|S')= the probability that the man reports it is a six when it is not a six = probability of not speak truth =1/4
P(S)= the probability that throw is six =1/6
P(S')= the probability that throw is not a six =1-1/6=6-1/6=5/6
Now we have to find the probability that the throw is actually six when the man reports it is a six i.e. P(S|R)
By the Bayes theorem,
Hence the correct option is (A).i.e 3/8
The number of millions in one crore are
One crore is equal to 100 lakhs.
One million is equal to 10 lakhs.
1 crore = 100/10 million
⇒1 crore = 10 million
Hence, option A is correct.
The number of millions in one crore are 10.
How many days are there in x weeks x days
One week has 7 days.
Thus, x weeks x days has,
Hence, option B is correct.
8x days are there in x weeks x days.
Thirty one crore fifty five lakh thirty
- two thousand eight hundred in numerals is written as
Thirty one crore fifty-five lakh thirty-two thousand eight hundred can be expressed in the Indian system as,
Option A is correct, that is
Thirty one crore fifty - five lakh thirty - two thousand eight hundred in numerals is written as 31,55,32,800.
The LCM of two numbers is 495 and their HCF is 5
If the sum of the numbers is 100 then their difference is:
The LCM of two numbers = 495
The HCF of two numbers = 5
Sum of the numbers = 100
Difference of the numbers = ?
Let one number be x and another number be 100 - x.
The correct answer is option A, that is
The difference between those two numbers is 10.