Vf Page:
<apex:page standardController="Account" extensions="AccountContactWrapper">
    <apex:form>
        <apex:pageBlock id="block">
            <apex:pageBlockButtons location="bottom">
                <!--<apex:commandButton value="Edit" action="{!processedRecords}"/>-->
                <apex:commandButton value="Delete Selected Records" action="{!deleteRecords}"/>
                <apex:commandButton value="Create Contact" action="{!createNewContact}"/>
            </apex:pageBlockButtons>
            <apex:pageBlockSection>
                <apex:pageBlockTable value="{!wrapperList}" var="wrap" id="table">
                    <apex:column>
                        <apex:inputCheckbox value="{!wrap.selected}"/>
                    </apex:column>
                    <apex:column value="{!wrap.con.FirstName}" headerValue="First Name"/>
                    <apex:column value="{!wrap.con.LastName}" headerValue="Last Name"/>
                    <apex:column value="{!wrap.con.Phone}" headerValue="Phone"/>
                </apex:pageBlockTable>
            </apex:pageBlockSection>
        </apex:pageBlock>
    </apex:form>
</apex:page>

Apex Controller:

public class AccountContactWrapper {
    List<Contact> selectedRecords {get;set;}
    public List<WrapperClass> wrapperList {get;set;}
    public List<Account> accList {get;set;}
    public AccountContactWrapper (ApexPages.StandardController stdController) {
        accList = [SELECT Id, Name FROM Account];
        wrapperList = new List<WrapperClass>();
        for(Contact c : [SELECT FirstName, LastName, Phone FROM Contact WHERE AccountId =: ApexPages.currentPage().getParameters().get('id')]) {
            wrapperList.add(new WrapperClass(c));
        }
    }
    //Deleting SelectedRecords
    public void deleteRecords() {
        List<Contact> selectedRecords = new List<Contact>();
        for (WrapperClass wrap : wrapperList) {
            if(wrap.selected==true) {
                selectedRecords.add(wrap.con);
            }
        }
        delete selectedRecords;
    }
    //Editing Selected Records
    /*public void editRecords() {
        List<Contact> selectedRecords = new List<Contact>();
        for (WrapperClass wrap : wrapperList) {
            if(wrap.selected==true) {
                selectedRecords.add(wrap.con);
            }
        }
        selectedRecords.isEdit=true;
    }*/
    //Creating New Contact
    public void createNewContact() {
        Contact contactObj = new Contact();
        contactObj.LastName = 'LastNameValue';
        contactObj.AccountId = ApexPages.currentPage().getParameters().get('id');
        insert contactObj;
    }
    public class WrapperClass {
        public Contact con {get;set;}
        public Boolean selected {get;set;}
        public WrapperClass (Contact c) {
            con=c;
            selected=false;
        }
    }
}