There are 27 students in chemistry class and 22 students in physics class, seven of these students take physics and chemistry. what is the ratio of the number of students taking only physics and chemistry?
کیمسٹری کلاس میں 27 طلباء اور فزکس کلاس میں 22 طلباء ہیں، ان طلباء میں سے سات فزکس اور کیمسٹری میں پڑھتے ہیں۔ صرف فزکس اور کیمسٹری لینے والے طلباء کی تعداد کا تناسب کیا ہے؟
Answer: 3:4
Explanation
Step-by-step explanation:
27+22-7=42
now 42-27=15
and42-22=20.
so required ratio=15:20=3:4
Sh31-8-2023
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