Let U be a universal set and A and B be subsets of U , which of the following is true according to De-Morganβs Law ?
A. (π΄βͺπ΅)β²=π΄β²βͺπ΅β²
B. (π¨βͺπ©)β²=π¨β²β©π©β²
C. (π΄β©π΅)β²=π΄β²β©π΅β²
D. All Of These
Some months have 30 days, some months have 31 days, how many months have at least 28 days?
A. 4 Months
B. 3 Months
C. 1 Months
D. All Of These
If a doctor gives you 3 pills(Tablets) and tells you to take one pill every half hour. How long would it be before, all the pills have been taken?
A. 1 Hour
B. 2 Hours
C. 3 Hours
D. 4 Hours