Question in probability:Task 3.3: In a symmetrical distribution themean, standard deviation and range of marksfor a group of 20 students are 50, 10 and 30respectively. Find the mean marks and standarddeviation of marks, if the students with thehighest and the lowest marks are excluded.

Farmula used Range=Xmaximum - Xminimum For symmetricity Xminimum = mean - Range/2 Xmaximum = mean…

Answered: Question in probability: Task 3.3: In a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question in probability: Task 3.3: In a symmetrical distribution the mean, standard deviation and range of marks for a group of 20 students are 50, 10 and 30 respectively. Find the mean marks and standard deviation of marks, if the students with the highest and the lowest marks are excluded.