Negation of ''Monu is in class X or Anu is in class XII'' is

Negation of "Ram of in class X or Rashmi is in Class XII" is

Write the negation of each of the disjunction: Ram is in class X or Rina is in Class IX.

Write the negation of each of the disjunction: Ram is in class X or Rina is in Class IX.

There are 25 girls and 15 boys in class XI and 30 boys and 20 girls in class XII. If a student chosen from a class, selected at random, happens to be a boy, find the probability that he has been chosen from class XII.

Write the negation of each of the following statements. Shekhar is in class 6 or Poonam is in class 7.