7th grade pupils

Pupils research which winter sport their classmates is most
popular. They found that 2/5 of classmates would most like to play hockey, skate preferred 2/9 pupils, 3/10 students prefer skiing, and 1/15 of classmates don't like any winter sport.

What proportion of pupils loves any other sport than hockey, skating or skiing?

Correct answer:

x =  1/90

Step-by-step explanation:

$$\begin{gathered} s=2/5+2/9+3/10+1/15=\frac{89}{90}\doteq 0.9889 \\ x=1-s=1-0.9889=\frac{1}{90}=0.0111 \end{gathered}$$

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