A musems offers a 2-hour guided tour. For groups with fewer than 25 people the cost is $9.25 per person, for groups with 25 people or more the cost is $8.50 per person. The 27 people in the 9.00 a.m. tour group each paid $ 9.25 in advance. What is the total refund that the museum owes the 9:00 a.m. group?

9 people went to a hotel for combined dinner. 8 people out of 9 spend Rs. 30 each on dinner . 9th person spend Rs. 20 more than then average of all 9 persons. Find the total expenditure on dinner

A comittee of 5 is to be chosen from group of 9 people.No.of ways it can be formed if 2 oarticular persons either serve together or mot at all.And 2 other particular persons refuses two serve with each other.

If 9 people go on a tour and pay a total of Rs 81,270.Find the amount paid by each person.

A company offers you the use of its computer for a fee. Plan A costs $4 6 to join and then $9 per hour to use the compound. Plan B costs $25 to join and then $2.25 per hour to use the computer. After how many minutes of use would the cost of plan A be the samee as the cost of plan B?

9 people went to a hotel for combined dinner. 8 people out of 9 spend Rs. 27 each on dinner . 9th person spend Rs. 16 less than then average of all persons. Find the total expenditure on dinner.

A farmer sells wheat . He mixes the two types of wheat he grows . 30 kg of the first group costs him Rs 900 and 20 kg of the other group costs him Rs 1100 . At what price per kg should he sell the mixture so as to earn 25% on his average cost ?

A committee of 5 is to be chosen from a group of 9 people.Number of ways in which it can be formed if two particular persons either serve together or not at all and two other particular persons refuse to serve with each other,is

Music is been played in two opposite galleries with certain group of people. In the first gallery a group of 4 singers were singing and in the second gallery 9 singers were singing. The two galleries are separate by the distance of 70m. Where should a person stand for hearing the same intensity of the singers voice? (Hit: The ratio of the sound intensity is equal to square of the ratio of their corresponding distances).