Yes, "Hello everyone" is generally an acceptable greeting.
It's a common and widely understood way to address a group of people. Whether it's "ok" depends on the context and your audience, but it's generally considered appropriate for most situations.
Here's a breakdown:
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Formality: "Hello everyone" sits in a middle ground regarding formality. It's more formal than "Hi everyone" or "Hey everyone" but less formal than "Good morning/afternoon/evening, everyone" or "Hello everybody."
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Acceptability: It's acceptable in a wide range of settings, including:
- Presentations
- Meetings
- Emails
- Casual conversations
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Alternatives: Depending on the context, other greetings might be more suitable:
- Formal: "Good morning/afternoon/evening, everyone," "Hello everybody."
- Informal: "Hi everyone," "Hey everyone," "Hey all."
Ultimately, using "Hello everyone" is a safe and effective greeting for most group situations.