IBM Company Numerical Ability Percentage

During the warranty period,15% of all model X computers require a warranty repair. Among the model X computers requiring a warranty repair. 50% require only a main board replacement and 20% require only a battery replacement, while 10% require both main board and battery replacement. What % of all model X computers will need to have atleast the main board or battery replaced during the warranty period?

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IBM Other Question

two administrative assistants were typing a 135 page report if one admin assistant typed one and 5/10 times as many pages as the other, how many pages did the more rapid admin assistant type? last week a software engineer spent 8 hours working on software application for a payroll program 4 hours working on an inventory program and 75% of her work hours on other things how many hours did she work that week
a)16
b)24
c)21
d)20
d)48