Question

The cost of 9 school bags is Rs. 2949.75. Find the cost of each bag ? O A. Rs. 327.25 B. Rs. 327.50 O C. Rs.327.75 O D. Rs. 328.75​

Answer 1

Answer:

Solution

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x

=65,

y

=67,σ

x

=2.5,σ

y

=2.5,ρ=0.8

regression line of y on x is

y−

y

=ρ

σ

x

σ

y

(x−

x

)

y−67=

2.5

0.8×3.5

(x−65)

y−67=

25

28

(x−65)

putting x=75

y−67=

25

28

(75−65)

y−67=

25

28

(10)

y−67=

5

56

=11.5⇒y=78.2

required value is Rs.78.2

Answer 2

Answer:

Just Divide 2949.75 by 9

the answer u get is Option C ) Rs 327.75