Which one of the following data sets has more than one mode?
A. {10, 20, 30, 30, 40, 50, 50}
B. {10, 20, 30, 40, 50, 70, 70}
C. {20, 20, 30, 30, 30, 40, 40}
D. {10, 20, 30, 40, 50, 60, 70}

step-by-step explanation:

ask goog great chance of finding the solution there

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

step-by-step explanation:

for volume, add base x height x width