You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
--------
Question: Question: From a Group of 10 People, Including George and Nina, 3 people are to be selected at random to work on a certain project. What is the probability that 3 people selected will include George but not Nina

 Option A: 5/56

 Option B: 9/56

 Option C: 28/120

 Option D: 21/56

 Option E: 25/56

Answer: Option C


Question: Question: There are six cards in which it has two king cards. all cards are turned down and two cards are opened what is the possibility to get two kings.

 Option A: 1/15

 Option B: 2/15

 Option C: 3/15

 Option D: 4/15

 Option E: 6/15

Answer: Option A


Question: Question: It takes 1.5 hours for Tim to mow the lawn. Linda can mow the same lawn in 2 hours. How long will it take John and Linda, work together, to mow the lawn?

 Option A: 51.1 minutes

 Option B: 51.3 minutes

 Option C: 51.5 minutes

 Option D: 51.7 minutes

 Option E: 51.9 minutes

Answer:
Option C