I assume the question was for a sequence of 3 notes out of the possible 10. If not, use the number 1010 and 33 with the same plan.
There would be 720 different sequences.
To find the number of ways, just multiply the number of possibilities for each note.
There are 10 for the first, then 9 for the second, and finally 8.
10 x 9 x 8 = 720
6 x 7 = 42
And the missing number is 8, because 7 x 8 = 56.
20 carnations
divide 28 roses by 7 to find one part of the ratio
= 4 ← 1 part of ratio
5 parts = 5 × 4 = 20 ← number of carnations
First, find the area of the large rectangle (25*18=450) then find the area of the small square (7.5^2=56.25) finally subtract the small square from the large rectangle
