When 7 fair coins are tossed simultaneously, in how many outcomes will…

When 7 fair coins are tossed simultaneously, in how many outcomes will the first and the last coin turn up heads?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #15523