45 students questioned,42 liked Mathematics or English or both,27 students like Mathematics and 22 students like English. find the number of students who like both Mathematics and English.​

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho