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In a shipment of 120 machine parts, 5% were defective. In another shipments of 80 machine parts, 10% were defective. For the two shipments combined, what percent of machine parts were defective?

A. 6.5%

B. 7%

C. 7.5%

D. 8%

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সঠিক উত্তরঃ B. 7%

Explanation:

৩০ বছর পর জেকভ তার বর্তমান বয়সের চারগুণ হবে । তার বর্তমান বয়স বের কর:
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একটি কুকুর একটি খরগোশকে ধরার জন্য তাড়া করে। কুকুর যে সময়ে ৪ বার লাফ দেয়, খরগোশ সে সময় ৫ বার লাফ দেয়। কিন্তু খরগোশ ৪ লাফে যতদূর যায় কুকুর ৩ লাফে ততদূর যায়। কুকুর ও খরগোশের গতিবেগের অনুপাত কত?
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In a shipment of 120 machine parts, 5% were defective. In another shipments of 80 machine parts, 10% were defective. For the two shipments combined, what percent of machine parts were defective?