Question

1. Find the mean of the following data 76, 68, 84, 69, 78.
2. Factorise x3 - 64 v3
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Answer 1

Step-by-step explanation:

First, we arrange the given observations in ascending order as follows <br> 22,34, 39,45,54,54,56,68,78 and 84 <br> Here, total number of observations , n=10 <br> Since, n is even, so we use the formula for median, <br> Median =

<br>

<br>

<br> Hence, the median of given data is 54

: The factored form of x3 + 64 is (x + 4)(x2 – 4x + 16).