एक निश्चित सामग्री के लिए, संप्रेषणीयता (transmissivity) और परावर्तकता (reflectivity) के मान क्रमशः 0.88 और 0.07 निर्दिष्ट हैं। उस सामग्री की अवशोषकता (absorptivity) कितनी है?

In Library P, the number of Non-Fiction books in 2024 is 20% more than that in 2023. In 2023, the total number of books in P was 420, with a ratio of Fiction to Non-Fiction books as 11 : 10. If the increase in the number of Non-Fiction books in P is 50% of the increase in the number of Fiction books in P, find the number of Fiction books in P in 2024.

A dairy owner sells 528 litres of milk daily in 1-litre packets across 3 varieties: Full Cream, Toned, and Double Toned. The sales of Toned milk packets are 80% higher than those of Full Cream milk packets, and the sales of Double Toned milk packets are 60% lower than those of Toned milk packets. How many packets of Double Toned milk does he sell per day?