Question
Risa, Lucy and Gavin scored a total of 229 marks for their Science mock exam. Lucy scored 77 marks. Gavin scored 13 less marks than Lucy. How many marks did Risa score?
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Risa, Lucy and Gavin scored a total of 229 marks for their Science mock exam. Lucy scored 77 marks. Gavin scored 13 less marks than Lucy. How many marks did Risa score?