In a group of 100 students, 25 own a laptop, 40 own a mobile phone, and 35 own either a
laptop or a mobile phone, but not both. Find the probability that a student chosen at
random
(i) owns both a laptop and a mobile phone,
(ii) owns neither a laptop nor a mobile phone,
(iii) owns a laptop, given that he owns a mobile phone.

My best answer is that the probability is 35/100 that the student chosen at random owns neither a laptop nor a mobile phone.

Step-by-step explanation:

If you go back and read the introductory passage, you will notice it says, "In a group of 100 students... 35 own either a laptop or a mobile phone, but not both." And I think the other numbers, I.E. 25 and 40, were just meant to throw us off. Therefore, I think 35/100 is the probability.

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

all it means is function 3