Sometimes Rajas is seen mixed with Sattva Tamas also exists with Rajas. With Tamas may also be seen Sattva. Also Sattva and Rajas and Tamas may be seen existing together and in cqual parts. They then form the Nature.
सत्त्वस्य तु रजो दृष्टं रजसश्च तमस्तथा॥ तमसश्च तथा सत्त्वं सत्त्वस्याव्यक्तमेव च।