1) A


Identify the weight of Jay. Since Jay is 150 cm tall and has a BMI of 22, their weight must be 49 kg. 

Identify the weight of Charlie. Since Charlie is 156 cm tall and has a BMI of 24, their weight must be 58 kg. 

Combined weight = 172
Let Alex’s weight be = A

A + 49 + 58 = 172
A = 172 – 49 – 58 = 65 kg

Since Alex is 162 cm tall and has a weight of 65 kg, their BMI must be 25.

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