Biscuits: 3 packets for the price of 2. 1 packet costs £1.45.
How much for 12 packets?

16 cartons ,each having 24 packets

Total no of packets=384 ,

costRs 1536 .

Cost per packet =1536/384= Rs 4

11 cartons, each having 25 packets

Total cost =11×25×4= Rs 1100

And Rs1100/-

Step-by-step explanation:

A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest tenth. Using this equation, estimate the homework grade, to the nearest integer, for a student with a test grade of 31.

Homework Grade (x) Test Grade (y)

58 52

75 66

66 68

85 74

52 38

74 65

78 76