We add up all those numbers (excluding 30) and divide by the number of numbers (9). This results in 78.8 (round up to 79).
79-74 = 5. So the mean has increased by 5 points. (C)
Step-by-step explanation:
i was busy so i did this much ...will solve later
The answer would be
<span>B)
A' (-8, 5)
B' (-8, 8)
C' (-5, 7)
D' (-4.5, 5)</span>
Last one should be less than 3/4