Bernice takes a multiple-choice test, each question having 4 choices. If Bernice has no idea of any answer and simply guesses, find the probability that she gets all the questions correct if the test has 1 question, 2 questions, 3 questions 4 questions

Can someone me with this problem . show your work .

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

What is the missing step in this proof ?