Thirty students were interviewed to find out what they want to be in future. Their responses are listed as below:

doctor, engineer, doctor, pilot, officer, doctor, engineer, doctor, pilot, officer, pilot, engineer, officer, pilot, doctor, engineer, pilot, officer, doctor, officer, doctor, pilot, engineer, doctor, pilot, officer, doctor, pilot, doctor, engineer

Arrange the data in a table using tally marks.

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Solution

We need to make three columns for :

Responses received,

Tally marks (for counting)

Number of Responses

The table thus obtained would be as follows:

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Question 25
Thirty students were interviewed to find out what they want to be n future. Their responses are listed as below:
doctor, engineer, doctor, pilot, officer, doctor, engineer, doctor, pilot, officer, pilot, engineer, officer, pilot, doctor, engineer, pilot, officer, doctor, officer, doctor, pilot, engineer, doctor, pilot, officer, doctor, pilot, doctor, engineer,
Arrange the data in a table using tally marks.

Q. A disaster relief team consists of engineers and doctors in the ratio of

2 : 5

.
(i) If there are

18

engineers, find the number of doctors.
(ii) If there are

65

doctors, find the number of engineers.

Find the number of ways in which 10 doctor and 90 engineers can sit in a row having 100 chairs such that no doctor sit at either end of the row and between any two doctors, at least five engineers sit.

Q. A group of