The mistake the student made in the second procedure is she tried to solve 3.7+2.6 the same way she solved 4.3+8.4, which that way doesn't always work. You have to understand how decimals work when it comes to adding them. The right way to solve 3.7+2.6 and be sure you are accurate is to line the numbers up. Then add the numbers behind the decimal which is 7+6. That equals 13. So you would out your 3 and carry your 1 over to the number in front of the decimal. So 3+2=5, plus the additional one you had to carry. Your final answer would be 6.3

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3 years ago

Please help! Both questions are in the photo. Thank you so much!

tangare [24]

The probability that a 4 shows up is 0.20 and the proportion of 3's rolled is 0.467

<h3>The probability that a 4 shows up</h3>

From the list of numbers, we have:

Sides = 5 i.e. numbers 1 to 5
n(4) = 1 i.e. sides labelled 4

The probability that a 4 shows up is then calculated as:

P = n(4)/Sides

This gives

P = 1/5

Evaluate

P = 0.2

<h3>The proportion of 3's rolled</h3>

In the list of numbers, we have:

Total = 15
Number of 3's = 7

The proportion of 3's rolled is then calculated as:

P = Number of 3's/Total

This gives

P = 7/15

Evaluate

P = 0.467

Hence, the proportion of 3's rolled is 0.467