Question

Amount spent by a group of 3 friends in the school canteen for 20 days of a month is
given below
Amount spent
No. of days
20
30
35
5
7
2
3
50
2
60
1
(1) Find the average amount spent per day
(2) How much money per day is spent by each?​

Answer 1

Answer:

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Answer 2

Answer:

Answer-

( identity : (a-b)² = a²-2ab +b²)

= {(2x - 5y)}^{2}=(2x−5y)

2

= {(2x)}^{2} - 2(2x)(5y) + {(5y)}^{2}=(2x)

2

−2(2x)(5y)+(5y)

2

= 4 {x}^{2} - 20xy + 25 {y}^{2}=4x

2

−20xy+25y

2