In math questions answers each questions are solved with explanation. The questions are based from different topics. Care has been taken to solve the questions in such a way that students can understand each and every step.

1. Which is greater than 4?

(a) 5,

(b) -5,

(c) -1/2,

(d) -25.


Solution:

5 greater than 4.

Answer: (a)

 

 

 

2 marks , 20. For each question in Part A of this test, a student who is just guessing has a 20% chance of being right. How many questions would a student have to guess at in order to have at least a 40% chance of guessing at least one of the questions right? SHOW ALL YOUR WORK.

please help me solve this math question. i have attached a file containing the question.

18. A multiple choice exam consists of 6 questions, and each question has 3 possible answers, exactly one of which is correct. Jeb decides to pick the answer to each question at random. What is the probabil- ity that he will get precisely two correct answers? (A) 16/729 (B) 2/3 (C) 1/3 (D) 80/243 (E) 40/243 (F) none of the above