Out of 90 scientists who study dinosaurs, 30 study the T-Rex, 22 study the Brontosaurs and 10 study both. How many of this group of scientists studies another speices of dinosaurs?
1 answer:
Answer:
it 152 u have to add 3 time like this
90+10+30+ it gives you 152
Step-by-step explanation:
hope this works or help
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