Yes, but your opportunity running outside a pool will be different.
Opportunity to be chosen as a slot-leader (produce a new transaction block and sign it) is derived by dividing your stake by the total value in the Cardano SL (Settlement Layer) system.
Example:
Your stake = 100
ADA Pool = 29,900
Total value in SL = 100,000
Solo:
100 / 100,000 = 0.001%
Pool:
(100 + 29,900) / 100,000 = 0.3%
100 / 29,900 = 0.00334448%
Opportunity to be chosen as a slot-leader:
Solo = 0.001%
Pool = 0.3%
Your contribution to the pool = 0.00334448%
The choice really is yours but the opportunity and thus rewards are different.