Answer:
Option C is correct.
f = 2
Step-by-step explanation:
The mean is the sum of variables divided by the number of variables
Mean = (Σfx)/(Σf)
xi | 15 | 17 | 20 | 30 | 10 + f
fi | 4 | 4 | 6 | 5 | 6
Σfx = (15×4) + (17×4) + (20×6) + (30×5) + [(10+f)×6] = 60 + 68 + 120 + 150 + 60 + 6f = (458 + 6f)
Σf = 4 + 4 + 6 + 5 + 6 = 25
Mean = 18.8
18.8 = (458+6f) ÷ 25
458 + 6f = 25 × 18.8 = 470
6f = 470 - 458 = 12
f = (12/6) = 2
Hope this Helps!!!
When multiplying two negative numbers the product will be positive. For example, 5*3=15 and -5*-3=15, but 5*-3=-15 likewise -5*3=-15.
Answer:
<h2>6 9/5</h2>
Step-by-step explanation:
<em><u>39/5 as a mixed number;</u></em>
<em><u>39/5 as a mixed number;39 ÷ 5 = 6 remaining 9</u></em>
Therefore:
6 9/5
7.$56,8.-$17,500,9.$810,10.-45,11.$-45,12.-$1,368,13.$27,14.$8,848,15.$390,$209
The last two would be your answer :)
