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⟩ Three companies are working independently and receiving the savings 20%, 30%, 40%. If the companies work combine, what will be their net savings?

suppose total income is 100

so amount x is getting is 80

y is 70

z =60

total=210

but total money is 300

300-210=90

so they are getting 90 rs less

90 is 30% of 300 so they r getting 30% discount

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