In how many ways can 3 singers be selected from 5 who came to an audition?. A. 1. B. 10. C. 5. D. 60
2 answers:
Answer: B. 10
Step-by-step explanation:
Given: The total number of singers who came to an audition= 5
The number of singers need to be selected = 3
The number of ways to select 3 singers from 5 singers is given by using combinations as :-
Hence, the number of ways to select 3 singers from 5 singers who came to an audition is 10.
You might be interested in
Answer:
Perimeter = 18.7 units
Area = 13.5 units²
Step-by-step explanation:
Perimeter of ADEC = AD + DE + EC + AC
Length of AD = 3 units
By applying Pythagoras theorem in ΔDBE,
DE² = DB² + BE²
DE² = 3² + 3²
DE = √18
DE = 4.24 units
Length of EC = 3 units
By applying Pythagoras theorem in ΔABC,
AC² = AB² + BC²
AC² = 6² + 6²
AC = √72
AC = 8.49 units
Perimeter of ADEC = 3 + 4.24 + 3 + 8.49
= 18.73 units
≈ 18.7 units
Area of ADEC = Area of ΔABC - Area of ΔBDE
Area of ΔABC =
=
= 18 units²
Area of ΔBDE =
=
= 4.5 units²
Area of ADEC = 18 - 4.5
= 13.5 units²
Step-by-step explanation:
The elements of matrices are represented in the form
Here r is the row number and c is the column number.
Given matrix is:
The elements of matrix will be represented by a_{r,c}
We have to find
Which means that the first row and third column.
The first row is: 3 6 9 and the element in third column is: 9
So,
Keywords: Matrices, Elements
Learn more about matrices at:
#LearnwithBrainly