(15 + 14 + 13 + 12 + 6) / 5
= 60 / 5
= 12
Price of 1 book=15239≈15.93
Price of 9 books=15.93×9≈143.37
The sum of the 5 numbers is:
5 × 23 = 115
The sum of the 4 numbers is:
4 × 25 = 100
The fifth number is:
115 - 100 = 15
We are given:
Total weight of 5 boxes with soup = 75 kg
Weight of each empty box = 3 kg
Step 1: Calculate the total weight of empty boxes
Since there are 5 boxes and each empty box weighs 3 kg:
5 boxes×3 kg=15 kg (total box weight)
Step 2: Subtract the empty box weight from the total weight
75 kg (total)−15 kg (boxes)=60 kg (soup only)
To find the average, first simplify the fractions:
1/2, 2/4 = 1/2, 3/6 = 1/2
All fractions are equal to 1/2.
Average = (1/2 + 1/2 + 1/2) / 3 = (3/2) / 3 = 1/2
Sum = 4 + 5 + 6 + 8 + 12 = 35
Average = 35 ÷ 5 = 7
Let the percentage deduction in weight be y%
y−4100−y×100=20⇒y−4100−y=15⇒5y−20=100−y⇒6y=120⇒y=20
Hence, for a meter, length used = (100 - 20)% of 1 m
= 80% of 100 cm = 80 cm
Sum=15+20+30+12+5=82
Average=582=16.4
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