Matrix A shows the weight of four boys and four girls in kg at the beginning of a diet programme to lose weight. Matrix B shows the corresponding weights after the diet programme.
$A = [\begin{matrix} 35 & 40 & 28 & 45 42 & 38 & 41 & 30 \end{matrix}] B o y s G i r l s, B = [\begin{matrix} 32 & 35 & 27 & 41 40 & 30 & 34 & 27 \end{matrix}] B o y s G i r l s$
Find the weight loss of the Boys and Girls.

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Solution

Weight loss matrix $A - B = [\begin{matrix} 35 & 40 & 28 & 45 42 & 38 & 41 & 30 \end{matrix}] - [\begin{matrix} 32 & 35 & 27 & 41 40 & 30 & 34 & 27 \end{matrix}]$
$= [\begin{matrix} 3 & 5 & 1 & 4 2 & 8 & 7 & 3 \end{matrix}]$ .

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Matrix A shows the weight of four boys and four girls in kg at the beginning of a diet programme to lose weight. Matrix B shows the corresponding weights after the diet programme.A=[3540284542384130]BoysGirls,B=[3235274140303427]BoysGirlsFind the weight loss of the Boys and Girls.

Weight loss matrix A−B=[3540284542384130]−[3235274140303427]=[35142873].

Weight loss matrix $A - B = [\begin{matrix} 35 & 40 & 28 & 45 42 & 38 & 41 & 30 \end{matrix}] - [\begin{matrix} 32 & 35 & 27 & 41 40 & 30 & 34 & 27 \end{matrix}]$
$= [\begin{matrix} 3 & 5 & 1 & 4 2 & 8 & 7 & 3 \end{matrix}]$ .