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Question

The following are the number of electric bulbs purchased for alodging house during the first four months of a year

Answer

Let \(\bowtie\) be the 10 bulbs

January \(\bowtie\bowtie\)

February \(\bowtie\bowtie\ltimes\)

March \(\bowtie\bowtie\bowtie\)

April \(\bowtie\bowtie\bowtie\ltimes\)
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