There are 12 ways he can pay this amount using the notes he has the answer is 12.
<h3>What are permutation and combination?</h3>
A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
Let x be the number of Rs10 notes and y be the Rs20 note
10x + 20y = 220
The whole number of x and y which satisfy the above equation:
x = 0, y =11
x = 2, y =10
x = 4, y =9
x = 6, y =8
x = 8, y =7
x = 10, y =6
x = 12, y =5
x = 14, y =4
x = 16, y =3
x = 18, y =2
x = 20, y =1
x = 22, y =0
Total number of ways = 12
Thus, there are 12 ways he can pay this amount using the notes he has the answer is 12.
Learn more about permutation and combination here:
brainly.com/question/2295036
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Answer:
c or a
Step-by-step explanation:
Answer: y = 2x - 4
Step-by-step explanation:
Gradient => (2 - (-2))/(3 - 1) = 4/2 = 2
so, equation is y = 2x + C
Using (3, 2) we have: 2 = 2(3) + C
Hence, C = -4
Therefore, y = 2x - 4
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Answer:
48 miles
Step-by-step explanation:
On Monday, Elliot rode 6 miles on a bike. On Tuesday, he rode 6 miles. On Wednesday, he rode 3 times farther than he did Monday and Tuesday combined.
How many miles has Elliot ridden so far this week?
This is calculated as:
Number of miles he rode on Monday + Number of miles he rode on Tuesday + Number of miles he rode on Wednesday
= 6 miles + 6 miles + 3(6 + 6)miles
= 12 miles + 3(12 miles)
= 12 miles + 36 miles
= 48 miles
Therefore, Elliot has ridden 48 miles so far