In the first three papers each of 100 marks, Ahmad got 90,77,83 marks. If he wants an average of greater than 75 marks and less than 80 marks, find the range of marks he should scored in 4th paper. A. 50 < X < 70
B. 75 < X < 80
C. 73 < X < 100
D. 25 < X < 75

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

The heir to the austrian throne, archduke franz ferdinand was gunned down by a young serbian terrorist. germany urged austria to declare war on serbia. russia mobilized against austria, then germany mobilized against russia. france and britain mobilized against germany. then young men such as adolf hitler volunteered in the war.

5|7-9|-2 the answer of this evaluation