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Answer:
10 students
Step-by-step explanation:
Given :-
50% younger than 10
1/20 (or 5%) are 10
1/10 (or 10%) are older than 10 but younger than 12
Remaining students = 100% - 50% - 10% - 5%
= 35%
= 70 students
Total students
=> 7T/20 = 70
=> 7T = 1400
=> T = 200
10 year old students
= T x 5%
= 200 x 1/20
= 10 students
Given :
[tex]50\%[/tex]younger than [tex]10[/tex]
[tex]\frac{1}{20} [/tex](or 5%) are 10
[tex]\frac{1}{10}[/tex] (or 10%) are older than 10 but younger than 12
☆Remaining students = [tex]100\% -50\% - 10\% - 5\%[/tex]
» [tex]35\%[/tex]
» [tex]{{\bold{{{{{ \pink{70 \: students}}}}}}}}[/tex]
☆Total students
↣ [tex]\frac{7 \: total}{20} = 70[/tex]
↣ [tex]7 \: total = 1400[/tex]
↣ [tex]{{\bold{{{{{ \pink{total = 200}}}}}}}}[/tex]
☆10 year old students
↣ [tex]total \times 5\%[/tex]
↣ [tex]200 \times \frac{1}{20}[/tex]
↣ [tex]{{\bold{{{{{ \pink{10 \: students}}}}}}}}[/tex]