Answer
Verified
444.6k+ views
Hint: We can solve the problem by finding the number of options for each lady differently and then multiply all possible options to get the desired result. When one tap is assigned to one lady then this tap can’t be assigned to another lady.
Complete step by step solution:
It is given in the problem that there are $5$ ladies that can draw water from the five taps. We have to find the number of ways that they can draw water from the tap.
Now, we have 5 different taps and 5 ladies.
When the first lady comes to draw the water from the tap, she will have 5 options to choose and she can choose any one of them. Hence, she has 5 options.
Now, when the second lady comes to draw water from the tap, she has the remaining 4 options as one is already chosen by the first lady. Hence, the second lady has 4 options. So, the second lady can choose any one from the remaining 4 taps.
Similarly, the third lady has three options, the fourth lady has two options and the last lady has only one option.
So, the required number of ways to draw the water from the tap is given as:
Required number of ways$ = 5 \times 4 \times 3 \times 2 \times 1$
Required number of ways$ = 120$
There are $120$ways to draw the water from $5$ taps.
Note: One can also solve this question by directly using the formula of permutation. When there are $n$ ways to choose $r$ quantities then the permutation is given as:
$^n{P_r} = \dfrac{{n!}}{{\left( {n - r} \right)!}}$
In the given problem, there are $5$ taps and $5$ ladies, so using the permutation, it can be express as:
\[^5{P_5} = \dfrac{{5!}}{{\left( {5 - 5} \right)!}}\]
\[{ \Rightarrow ^5}{P_5} = \dfrac{{5 \times 4 \times 3 \times 2 \times 1}}{{\left( 0 \right)!}}\]
\[{ \Rightarrow ^5}{P_5} = 120\]
So, there are $120$ ways to draw the water from the tap.
Complete step by step solution:
It is given in the problem that there are $5$ ladies that can draw water from the five taps. We have to find the number of ways that they can draw water from the tap.
Now, we have 5 different taps and 5 ladies.
When the first lady comes to draw the water from the tap, she will have 5 options to choose and she can choose any one of them. Hence, she has 5 options.
Now, when the second lady comes to draw water from the tap, she has the remaining 4 options as one is already chosen by the first lady. Hence, the second lady has 4 options. So, the second lady can choose any one from the remaining 4 taps.
Similarly, the third lady has three options, the fourth lady has two options and the last lady has only one option.
So, the required number of ways to draw the water from the tap is given as:
Required number of ways$ = 5 \times 4 \times 3 \times 2 \times 1$
Required number of ways$ = 120$
There are $120$ways to draw the water from $5$ taps.
Note: One can also solve this question by directly using the formula of permutation. When there are $n$ ways to choose $r$ quantities then the permutation is given as:
$^n{P_r} = \dfrac{{n!}}{{\left( {n - r} \right)!}}$
In the given problem, there are $5$ taps and $5$ ladies, so using the permutation, it can be express as:
\[^5{P_5} = \dfrac{{5!}}{{\left( {5 - 5} \right)!}}\]
\[{ \Rightarrow ^5}{P_5} = \dfrac{{5 \times 4 \times 3 \times 2 \times 1}}{{\left( 0 \right)!}}\]
\[{ \Rightarrow ^5}{P_5} = 120\]
So, there are $120$ ways to draw the water from the tap.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
10 examples of evaporation in daily life with explanations
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Why is there a time difference of about 5 hours between class 10 social science CBSE