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: A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.100, find the original price per kg?

Option A: Rs.3.2

Option B: Rs.2.9

Option C: Rs.2.5

Option D: Rs.5.2

Option E: Rs.2.1
Option C

Question: The probability that a visitor at the mall buys a pack of candy is 30%. If three visitors come to the mall today, what is the probability that exactly two will buy a pack of candy?

Option A: 343

Option B: 147

Option C: 189

Option D: 063

Option E: 027
Option C

Question: In what ratio must rice at Rs.30 per kg mixed with rice at Rs.10.80 per kg so that the mixture be worth Rs.10per kg Ans

Option A: 8:7

Option B: 8:8

Option C: 8:3

Option D: 8:2

Option E: 8:1
Option A