quantitative aptitude test 108

Test # 108
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1. In what proportion must walnut at Rs. 62/kg be mixed with walnut at Rs. 72/kg in order to obtain a mixture worth Rs. 65/ kg ?

Quantitative Aptitude
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let alone (something)
to not mention something, to say nothing of something
I do not have enough money to go to a movie let alone go on a holiday.
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