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A group of students is traveling by train. 30 students have mobile phones, 20 have tablets, and 15 have both. 15 students have neither. What is the to
Question

A group of students is traveling by train. 30 students have mobile phones, 20 have tablets, and 15 have both. 15 students have neither. What is the total number of students?

A.

30

B.

45

C.

50

D.

55

Correct option is C

Given:
A group of students is traveling by train. 30 students have mobile phones, 20 have tablets, and 15 have both.
15 students have neither. 
Solution:
Total students have mobile and tablets = 15 + 15 + 5 = 35
15 students have neither.
Total number of students = 35 + 15 
Total number of students = 50​​
Thus, the correct answer is (c).

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