Question

solve fast
needs answer quickly​

Answer 1

$Mean\:\: of\: \: combined\: \: three\: \: sets = Total\: Count/Total \: Sum$

$15 *6+22.5*4+24*5/ 6+4+5$

$=300/15$

$\large{\green{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\underline{\underline{\underline{ANSWER\:\: IS\:\: 20}}}}}}}}}}}}}}}$

Answer 2

$<Marquee behaviour-move><front color= "maganta yellow"><h1>20 is the correct answer </ht></marquee>$

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