What is the place value of 3 in 367892141?

A rainy day occurs once in every 5 days. One-quarter of the rainy days produce rainbows. The percentage of days having no rainbows is:

In a school, 180 students are studying in the 9^th class. Among them, 35% are rich and others are poor. There are 80 girls in the class, of whom 65% are poor. How many rich boys are there in the class?

In an election, Candidate A received 45% of the total votes, and Candidate B received 30% of the total votes.
If the remaining 15000 votes were invalid, find the total number of votes polled.

In an competitive examination, 66% candidates passed in section A, 74% in section B while 5% failed in both the sections. If 720 students passed in both the sections, find the total number of candidates who appeared in the competitive examination.

If 20% of 420 is x% less than 40% of 530, find x. (Up to two decimals)

A mobile is bought for Rs.4900 and sold at Rs.7105. Find the gain percentage.

If 76% of a number is added to 384, then the result is the number itself. Find the number.

Raja donates 16% of his savings to an old age home, 16% of the savings to an orphanage and 16% of his savings to foundations for medical help. The remaining amount Rs.7800 of savings is deposited in bank. Find the salary of Raja, if 20% of the salary is his savings amount. (In Rs.)

What value should come in the place of question mark (?) in the following equation?

(0.006/?)+ (0.004/0.04) + (0.03/0.3) = 0.3

If 30% of a certain number is 2430, then what is