Tag: maths

If $n(A) = n(B)$ then

If $n(A) = n(B)$ then:

The set contains $5$ elements, then the number of elements in the power set $P$ $(A)$ is equal to

Number of elements in  a set is called __________

In a city $20\%$ of the population travels by car, $50\%$ travels by bus and $10\%$ travels by both car and bus. Then, persons travelling by car or bus is

The number of elements of the power set of a set containing $n$ elements is

Let $U$ be the universal set for sets $A$ and $B$ such that $n(A)=200 , n(B)=300$ and $n(A\cap B)=100$, then $n(A'\cap B')$ is equal to $300$ provided that $n(U)$ is equal to

If $\displaystyle n(U)=700,n(A)= 200,n(B)= 240,n(A\cap B)= 100,$ then $\displaystyle n(A'\cup B') $ is equal to

A market research group conducted a survey of $2500$ consumers and reported that $1620$ consumers like product $p _{1}$ and $1500$ consumers like product $p _{2}$ then (Note $A$ and $B$ denotes the set of products $p _{1}$ and $p _{2}$ respectively)

In a community it is found that $52$% people like coffee and $73$% like tea. If $x\%$ like both coffee and tea then