hi need help with finding my expected values in my box please im so stuck on this.

Apparently having nothing better to do, you decide to flip two coins 155 times. The results are in the table below. Are the coins fair? Test at a 2% level of significance.

Coin Flips

Coin Flip Frequency

HH 30

HT 35

TH 45

TT 45

Coin Flips Observed Values(O) Expected Values (E)

HH 30 needs these

HT 35 need

TH 45 need

TT 45 need