14.94 cm ( to 2 dec. places )
We require the sum totals of the 2 groups before calculating the mean of all 14
using mean = 
Children's sum
12.6 = 
( cross-multiply )
sum = 6 × 12.6 = 75.6
Adult's sum
16.7 = 
( cross- multiply )
sum = 8 × 16.7 = 133.6
Total sum of all 14 = 75.6 + 133.6 = 209.2
mean = 
= 14.94 cm
A number line from negative 10 to 10 is shown, with numbers labelled at intervals of 2. An arrow is shown from point 0 to negative 8. Another arrow points from negative 8 to negative 6. Therefore, option C is the correct answer.
<h3>What is a number line?</h3>
A number line is a straight line with numbers placed at equal intervals. Positive numbers are placed to the right of 0 and negative numbers are placed to the left of zero.
When a number (x) is added x unit is moved to the right while if a number (x) is subtracted x unit is moved to the left.
Now, solve -8 - (-2)
= -8 + 2=-6
So, a number line from negative 10 to 10 with numbers labelled at intervals of 2. An arrow is shown from point 0 to negative 8 then since 2 is added, we move 2 units right from negative 8 to negative 6.
Therefore, option C is the correct answer.
To learn more about the number line visit:
brainly.com/question/13189025.
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Use explanation in picture
The probability of rolling a sum less than 8 with two dices is 5/6
