• 2021 December(E23) Math Question 6

    Sequences and Patterns

    - Arithmetic Sequences

    Arithmetic sequences
    Choice K
    1st  birthday  deposit=$5001st\; birthday\; deposit=\$ 500
    2nd  birthday  deposit=$500+$200=$7002nd\; birthday\; deposit=\$ 500+\$200=\$700

    Similarly deposit will be increased by $200 for every upcoming birthday. We have to find the deposits of all 6th birthdays.

    ∴  6th  birthday  deposit=$500+$1000=$1500\therefore \; 6th \; birthday\; deposit=\$ 500+\$1000=\$1500

    And

    Total  amount  of  money  deposited={500+1500}{2}×6=$6000Total\; amount\; of\; money\; deposited=\frac\{500+1500\}\{2\}\times6=\$6000

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