LADDER PROBLEM A fireman stood on the middle rung of a ladder directing water into a burning building.
As the smoke lessened, he stepped up three rungs and continued his work from that
point. A sudden flare-up forced him to go down five rungs. Later he climbed up seven
rungs to the top of the ladder and entered the building. How many rungs does the
ladder have?

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,

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: