Practice Problems (Junior Cert Mathematics): Flashcards

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Practice Problems
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14 cards from this deck

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Students with all 3 apps (W, I, S)

88

Total students with WhatsApp

3636

Total students with Instagram

4040

Total students with Snapchat

5454

Students with WhatsApp and Instagram (including all 3)

1414

Students with Instagram and Snapchat (including all 3)

2424

Total students in sixth year

8080

First step when filling 3-set Venn diagram

Start with centre where all 3 overlap

WhatsApp & Instagram only (not Snapchat)

148=614 - 8 = 6

Instagram & Snapchat only (not WhatsApp)

248=1624 - 8 = 16

Students with only Instagram

40(6+8+16)=1040 - (6 + 8 + 16) = 10

Students with only WhatsApp (in terms of xx)

22x22 - x

Students with only Snapchat (in terms of xx)

30x30 - x

Value of xx in the problem

1212

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