The mean pocket money of 29 students of a class is rupees 132. if one more students joined the class whose pocket money is rupees171 find the new mean Share with your friends Share 0 Rashi Lokwani answered this Dear Student, Mean = Sum of all observationNo. of observationsMean Pocket Money = Sum of pocket money of all studentsNo. of students132 = Sum of pocket money of all students29Sum of pocket money of all students = 132 × 29Sum of pocket money of all students = Rs. 3828Sum of pocket money of all students and one new student = 3828 + 171 = Rs. 3999New Mean Pocket Money = Sum of pocket money of all students and one new studentNo. of students + 1New Mean Pocket Money = 399930New Mean Pocket Money = Rs. 133.3 Mean = Sum of all observationNo. of observationsMean Pocket Money = Sum of pocket money of all studentsNo. of students132 = Sum of pocket money of all students29Sum of pocket money of all students = 132 × 29Sum of pocket money of all students = Rs. 3828Sum of pocket money of all students and one new student = 3828 + 171 = Rs. 3999New Mean Pocket Money = Sum of pocket money of all students and one new studentNo. of students + 1New Mean Pocket Money = 399930New Mean Pocket Money = Rs. 133.3 Regards 2 View Full Answer
