How many ways can you select four letters out of the word(adsbygoogle = window.adsbygoogle || []).push({}); parallelogram?

The answer on the book is 150. For me im stuck at using 8C4 and it seems to be the logical way. The reason I chose 8 is because some letters are repeating. So how can they have 150?

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# Homework Help: Combinations for word parallelogram

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