Of the 330 students at school, 72% are interested in learning French, 38%
Chinese, 30% both courses. If others are
interested in learning Spanish, how many are
interested in learning Spanish?

66 students

Step-by-step explanation:

Percentage of students learning Spanish = 100% - 72% - 38% + 30%

                                                                     = 20%

No. of students learning Spanish = × 330 students

                                                       = 66

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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